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注1：每题2个解法 = 【Minimum Runtime Solution】 + 【Minimum Memory Usage Solution】

注2：Mac:【command + F】 / Windows:【Ctrl + F】 → 输入题号或题名快速定位。

逆序No.	【Swift】 && 题目【Title】	C++	Java	Python3	Difficulty
1081	活字印刷 - Letter Tile Possibilities	C++	Java	Python3	Medium
1080	不同字符的最小子序列 - Smallest Subsequence of Distinct Characters	C++	Java	Python3	Medium
1079	根到叶路径上的不足节点 - Insufficient Nodes in Root to Leaf Paths	C++	Java	Python3	Medium
1078	Bigram 分词 - Occurrences After Bigram	C++	Java	Python3	Easy
1077	[Project Employees III $ 项目员工 III]	C++	Java	Python3	Medium
1076	[Project Employees II $ 项目员工 II]	C++	Java	Python3	Easy
1075	[Project Employees I $ 项目员工 I]	C++	Java	Python3	Easy
1074	元素和为目标值的子矩阵数量 - Number of Submatrices That Sum to Target	C++	Java	Python3	Hard
1073	负二进制数相加 - Adding Two Negabinary Numbers	C++	Java	Python3	Medium
1072	按列翻转得到最大值等行数 - Flip Columns For Maximum Number of Equal Rows	C++	Java	Python3	Medium
1071	字符串的最大公因子 - Greatest Common Divisor of Strings	C++	Java	Python3	Easy
1070	[产品销售分析III $ Product Sales Analysis III]	C++	Java	Python3	Medium
1069	[产品销售分析II $ Product Sales Analysis II]	C++	Java	Python3	Easy
1068	[产品销售分析I $ Product Sales Analysis I]	C++	Java	Python3	Easy
1067	范围内的数字计数 - Digit Count in Range	C++	Java	Python3	Hard
1066	校园自行车分配 II - Campus Bikes II	C++	Java	Python3	Medium
1065	字符串的索引对 - Index Pairs of a String	C++	Java	Python3	Easy
1064	不动点 - Fixed Point	C++	Java	Python3	Easy
1063	[有效子数组数 $ Number of Valid Subarrays]	C++	Java	Python3	Hard
1062	[最长重复子字符串 $ Longest Repeating Substring]	C++	Java	Python3	Medium
1061	[词典最小等价字符串 $ Lexicographically Smallest Equivalent String]	C++	Java	Python3	Medium
1060	[排序数组中缺少元素 $ Missing Element in Sorted Array]	C++	Java	Python3	Medium
1059	[从源头到目的地的所有路径 $ All Paths from Source Lead to Destination]	C++	Java	Python3	Hard
1058	[最小化舍入误差以达到目标 $ Minimize Rounding Error to Meet Target]	C++	Java	Python3	Medium
1057	[校园自行车 $ Campus Bikes]	C++	Java	Python3	Medium
1056	[混淆的数字 $ Confusing Number]	C++	Java	Python3	Easy
1055	[形成字符串的最短方法 $ Shortest Way to Form String]	C++	Java	Python3	Medium
1054	距离相等的条形码 - Distant Barcodes	C++	Java	Python3	Medium
1053	交换一次的先前排列 - Previous Permutation With One Swap	C++	Java	Python3	Medium
1052	爱生气的书店老板 - Grumpy Bookstore Owner	C++	Java	Python3	Medium
1051	高度检查器 - Height Checker	C++	Java	Python3	Easy
1050	合作至少三次的演员和导演 - Actors and Directors Who Cooperated At Least Three Times	C++	Java	Python3	Easy
1049	最后一块石头的重量 II - Last Stone Weight II	C++	Java	Python3	Medium
1048	最长字符串链 - Longest String Chain	C++	Java	Python3	Medium
1047	删除字符串中的所有相邻重复项 - Remove All Adjacent Duplicates In String	C++	Java	Python3	Easy
1046	最后一块石头的重量 - Last Stone Weight	C++	Java	Python3	Easy
1045	购买所有产品的客户 - Customers Who Bought All Products	C++	Java	Python3	Medium
1043	分隔数组以得到最大和 - Partition Array for Maximum Sum	C++	Java	Python3	Medium
1042	不邻接植花 - Flower Planting With No Adjacent	C++	Java	Python3	Easy
1041	困于环中的机器人 - Robot Bounded In Circle	C++	Java	Python3	Easy
1040	移动石子直到连续 II - Moving Stones Until Consecutive II	C++	Java	Python3	Medium
1039	多边形三角剖分的最低得分 - Minimum Score Triangulation of Polygon	C++	Java	Python3	Medium
1038	从二叉搜索树到更大和树 - Binary Search Tree to Greater Sum Tree	C++	Java	Python3	Medium
1037	有效的回旋镖 - Valid Boomerang	C++	Java	Python3	Easy
1036	逃离大迷宫 - Escape a Large Maze	C++	Java	Python3	Hard
1035	不相交的线 - Uncrossed Lines	C++	Java	Python3	Medium
1034	边框着色 - Coloring A Border	C++	Java	Python3	Medium
1033	移动石子直到连续 - Moving Stones Until Consecutive	C++	Java	Python3	Easy
1032	字符流 - Stream of Characters	C++	Java	Python3	Hard
1031	两个非重叠子数组的最大和 - Maximum Sum of Two Non-Overlapping Subarrays	C++	Java	Python3	Medium
1030	距离顺序排列矩阵单元格 - Matrix Cells in Distance Order	C++	Java	Python3	Easy
1029	两地调度 - Two City Scheduling	C++	Java	Python3	Easy
1028	从先序遍历还原二叉树 - Recover a Tree From Preorder Traversal	C++	Java	Python3	Hard
1027	最长等差数列 - Longest Arithmetic Sequence	C++	Java	Python3	Medium
1026	节点与其祖先之间的最大差值 - Maximum Difference Between Node and Ancestor	C++	Java	Python3	Medium
1025	除数博弈 - Divisor Game	C++	Java	Python3	Easy
1024	视频拼接 - Video Stitching	C++	Java	Python3	Medium
1023	驼峰式匹配 - Camelcase Matching	C++	Java	Python3	Medium
1022	从根到叶的二进制数之和 - Sum of Root To Leaf Binary Numbers	C++	Java	Python3	Easy
1021	删除最外层的括号 - Remove Outermost Parentheses	C++	Java	Python3	Easy
1020	飞地的数量 - Number of Enclaves	C++	Java	Python3	Medium
1019	链表中的下一个更大节点 - Next Greater Node In Linked List	C++	Java	Python3	Medium
1018	可被 5 整除的二进制前缀 - Binary Prefix Divisible By 5	C++	Java	Python3	Easy
1017	负二进制转换 - Convert to Base -2	C++	Java	Python3	Medium
1016	子串能表示从 1 到 N 数字的二进制串 - Binary String With Substrings Representing 1 To N	C++	Java	Python3	Medium
1015	可被 K 整除的最小整数 - Smallest Integer Divisible by K	C++	Java	Python3	Medium
1014	最佳观光组合 - Best Sightseeing Pair	C++	Java	Python3	Medium
1013	将数组分成和相等的三个部分 - Partition Array Into Three Parts With Equal Sum	C++	Java	Python3	Easy
1012	至少有 1 位重复的数字 - Numbers With 1 Repeated Digit	C++	Java	Python3	Hard
1011	在 D 天内送达包裹的能力 - Capacity To Ship Packages Within D Days	C++	Java	Python3	Medium
1010	总持续时间可被 60 整除的歌曲 - Pairs of Songs With Total Durations Divisible by 60	C++	Java	Python3	Easy
1009	十进制整数的补码 - Complement of Base 10 Integer	C++	Java	Python3	Easy
1008	先序遍历构造二叉树 - Construct Binary Search Tree from Preorder Traversal	C++	Java	Python3	Medium
1007	行相等的最少多米诺旋转 - Minimum Domino Rotations For Equal Row	C++	Java	Python3	Medium
1006	笨阶乘 - Clumsy Factorial	C++	Java	Python3	Medium
1005	K 次取反后最大化的数组和 - Maximize Sum Of Array After K Negations	C++	Java	Python3	Easy
1004	最大连续1的个数 III - Max Consecutive Ones III	C++	Java	Python3	Medium
1003	检查替换后的词是否有效 - Check If Word Is Valid After Substitutions	C++	Java	Python3	Medium
1002	查找常用字符 - Find Common Characters	C++	Java	Python3	Easy
1001	网格照明 - Grid Illumination	C++	Java	Python3	Hard
1000	合并石头的最低成本 - Minimum Cost to Merge Stones	C++	Java	Python3	Hard
999	车的可用捕获量 - Available Captures for Rook	C++	Java	Python3	Easy
998	最大二叉树 II - Maximum Binary Tree II	C++	Java	Python3	Medium
997	找到小镇的法官 - Find the Town Judge	C++	Java	Python3	Easy
996	正方形数组的数目 - Number of Squareful Arrays	C++	Java	Python3	Hard
995	K 连续位的最小翻转次数 - Minimum Number of K Consecutive Bit Flips	C++	Java	Python3	Hard
994	腐烂的橘子 - Rotting Oranges	C++	Java	Python3	Easy
993	二叉树的堂兄弟节点 - Cousins in Binary Tree	C++	Java	Python3	Easy
992	K 个不同整数的子数组 - Subarrays with K Different Integers	C++	Java	Python3	Hard
991	坏了的计算器 - Broken Calculator	C++	Java	Python3	Medium
990	等式方程的可满足性 - Satisfiability of Equality Equations	C++	Java	Python3	Medium
989	数组形式的整数加法 - Add to Array-Form of Integer	C++	Java	Python3	Easy
988	从叶结点开始的最小字符串 - Smallest String Starting From Leaf	C++	Java	Python3	Medium
987	二叉树的垂序遍历 - Vertical Order Traversal of a Binary Tree	C++	Java	Python3	Medium
986	区间列表的交集 - Interval List Intersections	C++	Java	Python3	Medium
985	查询后的偶数和 - Sum of Even Numbers After Queries	C++	Java	Python3	Easy
984	不含 AAA 或 BBB 的字符串 - String Without AAA or BBB	C++	Java	Python3	Medium
983	最低票价 - Minimum Cost For Tickets	C++	Java	Python3	Medium
982	按位与为零的三元组 - Triples with Bitwise AND Equal To Zero	C++	Java	Python3	Hard
981	基于时间的键值存储 - Time Based Key-Value Store	C++	Java	Python3	Medium
980	不同路径 III - Unique Paths III	C++	Java	Python3	Hard
979	在二叉树中分配硬币 - Distribute Coins in Binary Tree	C++	Java	Python3	Medium
978	最长湍流子数组 - Longest Turbulent Subarray	C++	Java	Python3	Medium
977	有序数组的平方 - Squares of a Sorted Array	C++	Java	Python3	Easy
976	三角形的最大周长 - Largest Perimeter Triangle	C++	Java	Python3	Easy
975	奇偶跳 - Odd Even Jump	C++	Java	Python3	Hard
974	和可被 K 整除的子数组 - Subarray Sums Divisible by K	C++	Java	Python3	Medium
973	最接近原点的 K 个点 - K Closest Points to Origin	C++	Java	Python3	Medium
972	相等的有理数 - Equal Rational Numbers	C++	Java	Python3	Hard
971	翻转二叉树以匹配先序遍历 - Flip Binary Tree To Match Preorder Traversal	C++	Java	Python3	Medium
970	强整数 - Powerful Integers	C++	Java	Python3	Easy
969	煎饼排序 - Pancake Sorting	C++	Java	Python3	Medium
968	监控二叉树 - Binary Tree Cameras	C++	Java	Python3	Hard
967	连续差相同的数字 - Numbers With Same Consecutive Differences	C++	Java	Python3	Medium
966	元音拼写检查器 - Vowel Spellchecker	C++	Java	Python3	Medium
965	单值二叉树 - Univalued Binary Tree	C++	Java	Python3	Easy
964	表示数字的最少运算符 - Least Operators to Express Number	C++	Java	Python3	Hard
963	最小面积矩形 II - Minimum Area Rectangle II	C++	Java	Python3	Medium
962	最大宽度坡 - Maximum Width Ramp	C++	Java	Python3	Medium
961	重复 N 次的元素 - N-Repeated Element in Size 2N Array	C++	Java	Python3	Easy
960	删列造序 III - Delete Columns to Make Sorted III	C++	Java	Python3	Hard
959	由斜杠划分区域 - Regions Cut By Slashes	C++	Java	Python3	Medium
958	二叉树的完全性检验 - Check Completeness of a Binary Tree	C++	Java	Python3	Medium
957	N天后的牢房 - Prison Cells After N Days	C++	Java	Python3	Medium
956	最高的广告牌 - Tallest Billboard	C++	Java	Python3	Hard
955	删列造序 II - Delete Columns to Make Sorted II	C++	Java	Python3	Medium
954	二倍数对数组 - Array of Doubled Pairs	C++	Java	Python3	Medium
953	验证外星语词典 - Verifying an Alien Dictionary	C++	Java	Python3	Easy
952	按公因数计算最大组件大小 - Largest Component Size by Common Factor	C++	Java	Python3	Hard
951	翻转等价二叉树 - Flip Equivalent Binary Trees	C++	Java	Python3	Medium
950	按递增顺序显示卡牌 - Reveal Cards In Increasing Order	C++	Java	Python3	Medium
949	给定数字能组成的最大时间 - Largest Time for Given Digits	C++	Java	Python3	Easy
948	令牌放置 - Bag of Tokens	C++	Java	Python3	Medium
947	移除最多的同行或同列石头 - Most Stones Removed with Same Row or Column	C++	Java	Python3	Medium
946	验证栈序列 - Validate Stack Sequences	C++	Java	Python3	Medium
945	使数组唯一的最小增量 - Minimum Increment to Make Array Unique	C++	Java	Python3	Medium
944	删除列以使之有序 - Delete Columns to Make Sorted	C++	Java	Python3	Easy
943	最短超级串 - Find the Shortest Superstring	C++	Java	Python3	Hard
942	增减字符串匹配 - DI String Match	C++	Java	Python3	Easy
941	有效的山脉数组 - Valid Mountain Array	C++	Java	Python3	Easy
940	不同的子序列 II - Distinct Subsequences II	C++	Java	Python3	Hard
939	最小面积矩形 - Minimum Area Rectangle	C++	Java	Python3	Medium
938	二叉搜索树的范围和 - Range Sum of BST	C++	Java	Python3	Medium
937	重新排列日志文件 - Reorder Log Files	C++	Java	Python3	Easy
936	戳印序列 - Stamping The Sequence	C++	Java	Python3	Hard
935	骑士拨号器 - Knight Dialer	C++	Java	Python3	Medium
934	最短的桥 - Shortest Bridge	C++	Java	Python3	Medium
933	最近的请求次数 - Number of Recent Calls	C++	Java	Python3	Easy
932	漂亮数组 - Beautiful Array	C++	Java	Python3	Medium
931	下降路径最小和 - Minimum Falling Path Sum	C++	Java	Python3	Medium
930	和相同的二元子数组 - Binary Subarrays With Sum	C++	Java	Python3	Medium
929	独特的电子邮件地址 - Unique Email Addresses	C++	Java	Python3	Easy
928	尽量减少恶意软件的传播 II - Minimize Malware Spread II	C++	Java	Python3	Hard
927	三等分 - Three Equal Parts	C++	Java	Python3	Hard
926	将字符串翻转到单调递增 - Flip String to Monotone Increasing	C++	Java	Python3	Medium
925	长按键入 - Long Pressed Name	C++	Java	Python3	Easy
924	尽量减少恶意软件的传播 - Minimize Malware Spread	C++	Java	Python3	Hard
923	三数之和的多种可能 - 3Sum With Multiplicity	C++	Java	Python3	Medium
922	按奇偶排序数组 II - Sort Array By Parity II	C++	Java	Python3	Easy
921	使括号有效的最少添加 - Minimum Add to Make Parentheses Valid	C++	Java	Python3	Medium
920	播放列表的数量 - Number of Music Playlists	C++	Java	Python3	Hard
919	完全二叉树插入器 - Complete Binary Tree Inserter	C++	Java	Python3	Medium
918	环形子数组的最大和 - Maximum Sum Circular Subarray	C++	Java	Python3	Medium
917	仅仅反转字母 - Reverse Only Letters	C++	Java	Python3	Easy
916	单词子集 - Word Subsets	C++	Java	Python3	Medium
915	将分区数组分成不相交的间隔 - Partition Array into Disjoint Intervals	C++	Java	Python3	Medium
914	一副牌中的X - X of a Kind in a Deck of Cards	C++	Java	Python3	Easy
913	猫与老鼠 - Cat and Mouse	C++	Java	Python3	Hard
912	排序数组 - Sort an Array	C++	Java	Python3	Medium
911	在线选举 - Online Election	C++	Java	Python3	Medium
910	最小差值 II - Smallest Range II	C++	Java	Python3	Medium
909	蛇梯棋 - Snakes and Ladders	C++	Java	Python3	Medium
908	最小差值 I - Smallest Range I	C++	Java	Python3	Easy
907	子数组的最小值之和 - Sum of Subarray Minimums	C++	Java	Python3	Medium
906	超级回文数 - Super Palindromes	C++	Java	Python3	Hard
905	按奇偶排序数组 - Sort Array By Parity	C++	Java	Python3	Easy
904	水果成篮 - Fruit Into Baskets	C++	Java	Python3	Medium
903	DI 序列的有效排列 - Valid Permutations for DI Sequence	C++	Java	Python3	Hard
902	最大为 N 的数字组合 - Numbers At Most N Given Digit Set	C++	Java	Python3	Hard
901	股票价格跨度 - Online Stock Span	C++	Java	Python3	Medium
900	RLE 迭代器 - RLE Iterator	C++	Java	Python3	Medium
899	有序队列 - Orderly Queue	C++	Java	Python3	Hard
898	子数组按位或操作 - Bitwise ORs of Subarrays	C++	Java	Python3	Medium
897	递增顺序查找树 - Increasing Order Search Tree	C++	Java	Python3	Easy
896	单调数列 - Monotonic Array	C++	Java	Python3	Easy
895	最大频率栈 - Maximum Frequency Stack	C++	Java	Python3	Hard
894	所有可能的满二叉树 - All Possible Full Binary Trees	C++	Java	Python3	Medium
893	特殊等价字符串组 - Groups of Special-Equivalent Strings	C++	Java	Python3	Easy
892	三维形体的表面积 - Surface Area of 3D Shapes	C++	Java	Python3	Easy
891	子序列宽度之和 - Sum of Subsequence Widths	C++	Java	Python3	Hard
890	查找和替换模式 - Find and Replace Pattern	C++	Java	Python3	Medium
889	根据前序和后序遍历构造二叉树 - Construct Binary Tree from Preorder and Postorder Traversal	C++	Java	Python3	Medium
888	公平的糖果交换 - Fair Candy Swap	C++	Java	Python3	Easy
887	鸡蛋掉落 - Super Egg Drop	C++	Java	Python3	Hard
886	可能的二分法 - Possible Bipartition	C++	Java	Python3	Medium
885	螺旋矩阵 III - Spiral Matrix III	C++	Java	Python3	Medium
884	两句话中的不常见单词 - Uncommon Words from Two Sentences	C++	Java	Python3	Easy
883	三维形体投影面积 - Projection Area of 3D Shapes	C++	Java	Python3	Easy
882	细分图中的可到达结点 - Reachable Nodes In Subdivided Graph	C++	Java	Python3	Hard
881	救生艇 - Boats to Save People	C++	Java	Python3	Medium
880	索引处的解码字符串 - Decoded String at Index	C++	Java	Python3	Medium
879	盈利计划 - Profitable Schemes	C++	Java	Python3	Hard
878	第 N 个神奇数字 - Nth Magical Number	C++	Java	Python3	Hard
877	石子游戏 - Stone Game	C++	Java	Python3	Medium
876	链表的中间结点 - Middle of the Linked List	C++	Java	Python3	Easy
875	爱吃香蕉的珂珂 - Koko Eating Bananas	C++	Java	Python3	Medium
874	模拟行走机器人 - Walking Robot Simulation	C++	Java	Python3	Easy
873	最长的斐波那契子序列的长度 - Length of Longest Fibonacci Subsequence	C++	Java	Python3	Medium
872	叶子相似的树 - Leaf-Similar Trees	C++	Java	Python3	Easy
871	最低加油次数 - Minimum Number of Refueling Stops	C++	Java	Python3	Hard
870	优势洗牌 - Advantage Shuffle	C++	Java	Python3	Medium
869	重新排序得到 2 的幂 - Reordered Power of 2	C++	Java	Python3	Medium
868	二进制间距 - Binary Gap	C++	Java	Python3	Easy
867	转置矩阵 - Transpose Matrix	C++	Java	Python3	Easy
866	回文素数 - Prime Palindrome	C++	Java	Python3	Medium
865	具有所有最深结点的最小子树 - Smallest Subtree with all the Deepest Nodes	C++	Java	Python3	Medium
864	获取所有钥匙的最短路径 - Shortest Path to Get All Keys	C++	Java	Python3	Hard
863	二叉树中所有距离为 K 的结点 - All Nodes Distance K in Binary Tree	C++	Java	Python3	Medium
862	和至少为 K 的最短子数组 - Shortest Subarray with Sum at Least K	C++	Java	Python3	Hard
861	翻转矩阵后的得分 - Score After Flipping Matrix	C++	Java	Python3	Medium
860	柠檬水找零 - Lemonade Change	C++	Java	Python3	Easy
859	亲密字符串 - Buddy Strings	C++	Java	Python3	Easy
858	镜面反射 - Mirror Reflection	C++	Java	Python3	Medium
857	雇佣 K 名工人的最低成本 - Minimum Cost to Hire K Workers	C++	Java	Python3	Hard
856	括号的分数 - Score of Parentheses	C++	Java	Python3	Medium
855	考场就座 - Exam Room	C++	Java	Python3	Medium
854	相似度为 K 的字符串 - K-Similar Strings	C++	Java	Python3	Hard
853	车队 - Car Fleet	C++	Java	Python3	Medium
852	山脉数组的峰顶索引 - Peak Index in a Mountain Array	C++	Java	Python3	Easy
851	喧闹和富有 - Loud and Rich	C++	Java	Python3	Medium
850	矩形面积 II - Rectangle Area II	C++	Java	Python3	Hard
849	到最近的人的最大距离 - Maximize Distance to Closest Person	C++	Java	Python3	Easy
848	字母移位 - Shifting Letters	C++	Java	Python3	Medium
847	访问所有节点的最短路径 - Shortest Path Visiting All Nodes	C++	Java	Python3	Hard
846	一手顺子 - Hand of Straights	C++	Java	Python3	Medium
845	数组中的最长山脉 - Longest Mountain in Array	C++	Java	Python3	Medium
844	比较含退格的字符串 - Backspace String Compare	C++	Java	Python3	Easy
843	猜猜这个单词 - Guess the Word	C++	Java	Python3	Hard
842	将数组拆分成斐波那契序列 - Split Array into Fibonacci Sequence	C++	Java	Python3	Medium
841	钥匙和房间 - Keys and Rooms	C++	Java	Python3	Medium
840	矩阵中的幻方 - Magic Squares In Grid	C++	Java	Python3	Easy
839	相似字符串组 - Similar String Groups	C++	Java	Python3	Hard
838	推多米诺 - Push Dominoes	C++	Java	Python3	Medium
837	新21点 - New 21 Game	C++	Java	Python3	Medium
836	矩形重叠 - Rectangle Overlap	C++	Java	Python3	Easy
835	图像重叠 - Image Overlap	C++	Java	Python3	Medium
834	树中距离之和 - Sum of Distances in Tree	C++	Java	Python3	Hard
833	字符串中的查找与替换 - Find And Replace in String	C++	Java	Python3	Medium
832	翻转图像 - Flipping an Image	C++	Java	Python3	Easy
831	隐藏个人信息 - Masking Personal Information	C++	Java	Python3	Medium
830	较大分组的位置 - Positions of Large Groups	C++	Java	Python3	Easy
829	连续整数求和 - Consecutive Numbers Sum	C++	Java	Python3	Hard
828	独特字符串 - Unique Letter String	C++	Java	Python3	Hard
827	最大人工岛 - Making A Large Island	C++	Java	Python3	Hard
826	安排工作以达到最大收益 - Most Profit Assigning Work	C++	Java	Python3	Medium
825	适龄的朋友 - Friends Of Appropriate Ages	C++	Java	Python3	Medium
824	山羊拉丁文 - Goat Latin	C++	Java	Python3	Easy
823	带因子的二叉树 - Binary Trees With Factors	C++	Java	Python3	Medium
822	翻转卡片游戏 - Card Flipping Game	C++	Java	Python3	Medium
821	字符的最短距离 - Shortest Distance to a Character	C++	Java	Python3	Easy
820	单词的压缩编码 - Short Encoding of Words	C++	Java	Python3	Medium
819	最常见的单词 - Most Common Word	C++	Java	Python3	Easy
818	赛车 - Race Car	C++	Java	Python3	Hard
817	链表组件 - Linked List Components	C++	Java	Python3	Medium
816	模糊坐标 - Ambiguous Coordinates	C++	Java	Python3	Medium
815	公交路线 - Bus Routes	C++	Java	Python3	Hard
814	二叉树剪枝 - Binary Tree Pruning	C++	Java	Python3	Medium
813	最大平均值和的分组 - Largest Sum of Averages	C++	Java	Python3	Medium
812	最大三角形面积 - Largest Triangle Area	C++	Java	Python3	Easy
811	子域名访问计数 - Subdomain Visit Count	C++	Java	Python3	Easy
810	黑板异或游戏 - Chalkboard XOR Game	C++	Java	Python3	Hard
809	情感丰富的文字 - Expressive Words	C++	Java	Python3	Medium
808	分汤 - Soup Servings	C++	Java	Python3	Medium
807	保持城市天际线 - Max Increase to Keep City Skyline	C++	Java	Python3	Medium
806	写字符串需要的行数 - Number of Lines To Write String	C++	Java	Python3	Easy
805	数组的均值分割 - Split Array With Same Average	C++	Java	Python3	Hard
804	唯一摩尔斯密码词 - Unique Morse Code Words	C++	Java	Python3	Easy
803	打砖块 - Bricks Falling When Hit	C++	Java	Python3	Hard
802	找到最终的安全状态 - Find Eventual Safe States	C++	Java	Python3	Medium
801	使序列递增的最小交换次数 - Minimum Swaps To Make Sequences Increasing	C++	Java	Python3	Medium
800		C++	Java	Python3	Easy
799	香槟塔 - Champagne Tower	C++	Java	Python3	Medium
798	得分最高的最小轮调 - Smallest Rotation with Highest Score	C++	Java	Python3	Hard
797	所有可能的路径 - All Paths From Source to Target	C++	Java	Python3	Medium
796	旋转字符串 - Rotate String	C++	Java	Python3	Easy
795	区间子数组个数 - Number of Subarrays with Bounded Maximum	C++	Java	Python3	Medium
794	有效的井字游戏 - Valid Tic-Tac-Toe State	C++	Java	Python3	Medium
793	阶乘函数后K个零 - Preimage Size of Factorial Zeroes Function	C++	Java	Python3	Hard
792	匹配子序列的单词数 - Number of Matching Subsequences	C++	Java	Python3	Medium
791	自定义字符串排序 - Custom Sort String	C++	Java	Python3	Medium
790	多米诺和托米诺平铺 - Domino and Tromino Tiling	C++	Java	Python3	Medium
789	逃脱阻碍者 - Escape The Ghosts	C++	Java	Python3	Medium
788	旋转数字 - Rotated Digits	C++	Java	Python3	Easy
787	K 站中转内最便宜的航班 - Cheapest Flights Within K Stops	C++	Java	Python3	Medium
786	第 K 个最小的素数分数 - K-th Smallest Prime Fraction	C++	Java	Python3	Hard
785	判断二分图 - Is Graph Bipartite?	C++	Java	Python3	Medium
784	字母大小写全排列 - Letter Case Permutation	C++	Java	Python3	Easy
783	二叉搜索树结点最小距离 - Minimum Distance Between BST Nodes	C++	Java	Python3	Easy
782	变为棋盘 - Transform to Chessboard	C++	Java	Python3	Hard
781	森林中的兔子 - Rabbits in Forest	C++	Java	Python3	Medium
780	到达终点 - Reaching Points	C++	Java	Python3	Hard
779	第K个语法符号 - K-th Symbol in Grammar	C++	Java	Python3	Medium
778	水位上升的泳池中游泳 - Swim in Rising Water	C++	Java	Python3	Hard
777	在LR字符串中交换相邻字符 - Swap Adjacent in LR String	C++	Java	Python3	Medium
776		C++	Java	Python3	Medium
775	全局倒置与局部倒置 - Global and Local Inversions	C++	Java	Python3	Medium
774		C++	Java	Python3	Hard
773	滑动谜题 - Sliding Puzzle	C++	Java	Python3	Hard
772		C++	Java	Python3	Hard
771	宝石与石头 - Jewels and Stones	C++	Java	Python3	Easy
770	基本计算器 IV - Basic Calculator IV	C++	Java	Python3	Hard
769	最多能完成排序的块 - Max Chunks To Make Sorted	C++	Java	Python3	Medium
768	最多能完成排序的块 II - Max Chunks To Make Sorted II	C++	Java	Python3	Hard
767	重构字符串 - Reorganize String	C++	Java	Python3	Medium
766	托普利茨矩阵 - Toeplitz Matrix	C++	Java	Python3	Easy
765	情侣牵手 - Couples Holding Hands	C++	Java	Python3	Hard
764	最大加号标志 - Largest Plus Sign	C++	Java	Python3	Medium
763	划分字母区间 - Partition Labels	C++	Java	Python3	Medium
762	二进制表示中质数个计算置位 - Prime Number of Set Bits in Binary Representation	C++	Java	Python3	Easy
761	特殊的二进制序列 - Special Binary String	C++	Java	Python3	Hard
760		C++	Java	Python3	Easy
759		C++	Java	Python3	Hard
758		C++	Java	Python3	Easy
757	设置交集大小至少为2 - Set Intersection Size At Least Two	C++	Java	Python3	Hard
756	金字塔转换矩阵 - Pyramid Transition Matrix	C++	Java	Python3	Medium
755		C++	Java	Python3	Medium
754	到达终点数字 - Reach a Number	C++	Java	Python3	Easy
753	破解保险箱 - Cracking the Safe	C++	Java	Python3	Hard
752	打开转盘锁 - Open the Lock	C++	Java	Python3	Medium
751		C++	Java	Python3	Easy
750		C++	Java	Python3	Medium
749	隔离病毒 - Contain Virus	C++	Java	Python3	Hard
748	最短完整词 - Shortest Completing Word	C++	Java	Python3	Easy
747	至少是其他数字两倍的最大数 - Largest Number At Least Twice of Others	C++	Java	Python3	Easy
746	使用最小花费爬楼梯 - Min Cost Climbing Stairs	C++	Java	Python3	Easy
745	前缀和后缀搜索 - Prefix and Suffix Search	C++	Java	Python3	Hard
744	寻找比目标字母大的最小字母 - Find Smallest Letter Greater Than Target	C++	Java	Python3	Easy
743	网络延迟时间 - Network Delay Time	C++	Java	Python3	Medium
742		C++	Java	Python3	Medium
741	摘樱桃 - Cherry Pickup	C++	Java	Python3	Hard
740	删除与获得点数 - Delete and Earn	C++	Java	Python3	Medium
739	每日温度 - Daily Temperatures	C++	Java	Python3	Medium
738	单调递增的数字 - Monotone Increasing Digits	C++	Java	Python3	Medium
737		C++	Java	Python3	Medium
736	Lisp 语法解析 - Parse Lisp Expression	C++	Java	Python3	Medium
735	行星碰撞 - Asteroid Collision	C++	Java	Python3	Medium
734		C++	Java	Python3	Easy
733	图像渲染 - Flood Fill	C++	Java	Python3	Easy
732	我的日程安排表 III - My Calendar III	C++	Java	Python3	Hard
731	我的日程安排表 II - My Calendar II	C++	Java	Python3	Medium
730	统计不同回文子字符串 - Count Different Palindromic Subsequences	C++	Java	Python3	Hard
729	我的日程安排表 I - My Calendar I	C++	Java	Python3	Medium
728	自除数 - Self Dividing Numbers	C++	Java	Python3	Easy
727		C++	Java	Python3	Hard
726	原子的数量 - Number of Atoms	C++	Java	Python3	Hard
725	分隔链表 - Split Linked List in Parts	C++	Java	Python3	Medium
724	寻找数组的中心索引 - Find Pivot Index	C++	Java	Python3	Easy
723		C++	Java	Python3	Medium
722	删除注释 - Remove Comments	C++	Java	Python3	Medium
721	账户合并 - Accounts Merge	C++	Java	Python3	Medium
720	词典中最长的单词 - Longest Word in Dictionary	C++	Java	Python3	Easy
719	找出第 k 小的距离对 - Find K-th Smallest Pair Distance	C++	Java	Python3	Hard
718	最长重复子数组 - Maximum Length of Repeated Subarray	C++	Java	Python3	Medium
717	1比特与2比特字符 - 1-bit and 2-bit Characters	C++	Java	Python3	Easy
716		C++	Java	Python3	Easy
715	Range 模块 - Range Module	C++	Java	Python3	Hard
714	买卖股票的最佳时机含手续费 - Best Time to Buy and Sell Stock with Transaction Fee	C++	Java	Python3	Medium
713	乘积小于K的子数组 - Subarray Product Less Than K	C++	Java	Python3	Medium
712	两个字符串的最小ASCII删除和 - Minimum ASCII Delete Sum for Two Strings	C++	Java	Python3	Medium
711		C++	Java	Python3	Hard
710	黑名单中的随机数 - Random Pick with Blacklist	C++	Java	Python3	Hard
709	转换成小写字母 - To Lower Case	C++	Java	Python3	Easy
708		C++	Java	Python3	Medium
707	设计链表 - Design Linked List	C++	Java	Python3	Easy
706	设计哈希映射 - Design HashMap	C++	Java	Python3	Easy
705	设计哈希集合 - Design HashSet	C++	Java	Python3	Easy
704	二分查找 - Binary Search	C++	Java	Python3	Easy
703	数据流中的第K大元素 - Kth Largest Element in a Stream	C++	Java	Python3	Easy
702		C++	Java	Python3	Medium
701	二叉搜索树中的插入操作 - Insert into a Binary Search Tree	C++	Java	Python3	Medium
700	二叉搜索树中的搜索 - Search in a Binary Search Tree	C++	Java	Python3	Easy
699	掉落的方块 - Falling Squares	C++	Java	Python3	Hard
698	划分为k个相等的子集 - Partition to K Equal Sum Subsets	C++	Java	Python3	Medium
697	数组的度 - Degree of an Array	C++	Java	Python3	Easy
696	计数二进制子串 - Count Binary Substrings	C++	Java	Python3	Easy
695	岛屿的最大面积 - Max Area of Island	C++	Java	Python3	Medium
694		C++	Java	Python3	Medium
693	交替位二进制数 - Binary Number with Alternating Bits	C++	Java	Python3	Easy
692	前K个高频单词 - Top K Frequent Words	C++	Java	Python3	Medium
691	贴纸拼词 - Stickers to Spell Word	C++	Java	Python3	Hard
690	员工的重要性 - Employee Importance	C++	Java	Python3	Easy
689	三个无重叠子数组的最大和 - Maximum Sum of 3 Non-Overlapping Subarrays	C++	Java	Python3	Hard
688	“马”在棋盘上的概率 - Knight Probability in Chessboard	C++	Java	Python3	Medium
687	最长同值路径 - Longest Univalue Path	C++	Java	Python3	Easy
686	重复叠加字符串匹配 - Repeated String Match	C++	Java	Python3	Easy
685	冗余连接 II - Redundant Connection II	C++	Java	Python3	Hard
684	冗余连接 - Redundant Connection	C++	Java	Python3	Medium
683		C++	Java	Python3	Hard
682	棒球比赛 - Baseball Game	C++	Java	Python3	Easy
681		C++	Java	Python3	Medium
680	验证回文字符串 Ⅱ - Valid Palindrome II	C++	Java	Python3	Easy
679	24点游戏 - 24 Game	C++	Java	Python3	Medium
678	有效的括号字符串 - Valid Parenthesis String	C++	Java	Python3	Medium
677	键值映射 - Map Sum Pairs	C++	Java	Python3	Medium
676	实现一个魔法字典 - Implement Magic Dictionary	C++	Java	Python3	Medium
675	为高尔夫比赛砍树 - Cut Off Trees for Golf Event	C++	Java	Python3	Hard
674	最长连续递增序列 - Longest Continuous Increasing Subsequence	C++	Java	Python3	Easy
673	最长递增子序列的个数 - Number of Longest Increasing Subsequence	C++	Java	Python3	Medium
672	灯泡开关 Ⅱ - Bulb Switcher II	C++	Java	Python3	Medium
671	二叉树中第二小的节点 - Second Minimum Node In a Binary Tree	C++	Java	Python3	Easy
670	最大交换 - Maximum Swap	C++	Java	Python3	Medium
669	修剪二叉搜索树 - Trim a Binary Search Tree	C++	Java	Python3	Easy
668	乘法表中第k小的数 - Kth Smallest Number in Multiplication Table	C++	Java	Python3	Hard
667	优美的排列 II - Beautiful Arrangement II	C++	Java	Python3	Medium
666		C++	Java	Python3	Medium
665	非递减数列 - Non-decreasing Array	C++	Java	Python3	Medium
664	奇怪的打印机 - Strange Printer	C++	Java	Python3	Medium
663		C++	Java	Python3	Medium
662	二叉树最大宽度 - Maximum Width of Binary Tree	C++	Java	Python3	Medium
661	图片平滑器 - Image Smoother	C++	Java	Python3	Easy
660		C++	Java	Python3	Hard
659	分割数组为连续子序列 - Split Array into Consecutive Subsequences	C++	Java	Python3	Medium
658	找到 K 个最接近的元素 - Find K Closest Elements	C++	Java	Python3	Medium
657	机器人能否返回原点 - Robot Return to Origin	C++	Java	Python3	Easy
656		C++	Java	Python3	Hard
655	输出二叉树 - Print Binary Tree	C++	Java	Python3	Medium
654	最大二叉树 - Maximum Binary Tree	C++	Java	Python3	Medium
653	两数之和 IV - 输入 BST - Two Sum IV - Input is a BST	C++	Java	Python3	Easy
652	寻找重复的子树 - Find Duplicate Subtrees	C++	Java	Python3	Medium
651		C++	Java	Python3	Medium
650	只有两个键的键盘 - 2 Keys Keyboard	C++	Java	Python3	Medium
649	Dota2 参议院 - Dota2 Senate	C++	Java	Python3	Medium
648	单词替换 - Replace Words	C++	Java	Python3	Medium
647	回文子串 - Palindromic Substrings	C++	Java	Python3	Medium
646	最长数对链 - Maximum Length of Pair Chain	C++	Java	Python3	Medium
645	错误的集合 - Set Mismatch	C++	Java	Python3	Easy
644		C++	Java	Python3	Hard
643	子数组最大平均数 I - Maximum Average Subarray I	C++	Java	Python3	Easy
642		C++	Java	Python3	Hard
641	设计循环双端队列 - Design Circular Deque	C++	Java	Python3	Medium
640	求解方程 - Solve the Equation	C++	Java	Python3	Medium
639	解码方法 2 - Decode Ways II	C++	Java	Python3	Hard
638	大礼包 - Shopping Offers	C++	Java	Python3	Medium
637	二叉树的层平均值 - Average of Levels in Binary Tree	C++	Java	Python3	Easy
636	函数的独占时间 - Exclusive Time of Functions	C++	Java	Python3	Medium
635		C++	Java	Python3	Medium
634		C++	Java	Python3	Medium
633	平方数之和 - Sum of Square Numbers	C++	Java	Python3	Easy
632	最小区间 - Smallest Range	C++	Java	Python3	Hard
631		C++	Java	Python3	Hard
630	课程表 III - Course Schedule III	C++	Java	Python3	Hard
629	K个逆序对数组 - K Inverse Pairs Array	C++	Java	Python3	Hard
628	三个数的最大乘积 - Maximum Product of Three Numbers	C++	Java	Python3	Easy
627	交换工资 - Swap Salary	C++	Java	Python3	Easy
626	换座位 - Exchange Seats	C++	Java	Python3	Medium
625		C++	Java	Python3	Medium
624		C++	Java	Python3	Easy
623	在二叉树中增加一行 - Add One Row to Tree	C++	Java	Python3	Medium
622	设计循环队列 - Design Circular Queue	C++	Java	Python3	Medium
621	任务调度器 - Task Scheduler	C++	Java	Python3	Medium
620	有趣的电影 - Not Boring Movies	C++	Java	Python3	Easy
619		C++	Java	Python3	Easy
618		C++	Java	Python3	Hard
617	合并二叉树 - Merge Two Binary Trees	C++	Java	Python3	Easy
616		C++	Java	Python3	Medium
615		C++	Java	Python3	Hard
614		C++	Java	Python3	Medium
613		C++	Java	Python3	Easy
612		C++	Java	Python3	Medium
611	有效三角形的个数 - Valid Triangle Number	C++	Java	Python3	Medium
610		C++	Java	Python3	Easy
609	在系统中查找重复文件 - Find Duplicate File in System	C++	Java	Python3	Medium
608		C++	Java	Python3	Medium
607		C++	Java	Python3	Easy
606	根据二叉树创建字符串 - Construct String from Binary Tree	C++	Java	Python3	Easy
605	种花问题 - Can Place Flowers	C++	Java	Python3	Easy
604		C++	Java	Python3	Easy
603		C++	Java	Python3	Easy
602		C++	Java	Python3	Medium
601	体育馆的人流量 - Human Traffic of Stadium	C++	Java	Python3	Hard
600	不含连续1的非负整数 - Non-negative Integers without Consecutive Ones	C++	Java	Python3	Hard
599	两个列表的最小索引总和 - Minimum Index Sum of Two Lists	C++	Java	Python3	Easy
598	范围求和 II - Range Addition II	C++	Java	Python3	Easy
597		C++	Java	Python3	Easy
596	超过5名学生的课 - Classes More Than 5 Students	C++	Java	Python3	Easy
595	大的国家 - Big Countries	C++	Java	Python3	Easy
594	最长和谐子序列 - Longest Harmonious Subsequence	C++	Java	Python3	Easy
593	有效的正方形 - Valid Square	C++	Java	Python3	Medium
592	分数加减运算 - Fraction Addition and Subtraction	C++	Java	Python3	Medium
591	标签验证器 - Tag Validator	C++	Java	Python3	Hard
590		C++	Java	Python3	Easy
589		C++	Java	Python3	Easy
588		C++	Java	Python3	Hard
587	安装栅栏 - Erect the Fence	C++	Java	Python3	Hard
586		C++	Java	Python3	Easy
585		C++	Java	Python3	Medium
584		C++	Java	Python3	Easy
583	两个字符串的删除操作 - Delete Operation for Two Strings	C++	Java	Python3	Medium
582		C++	Java	Python3	Medium
581	最短无序连续子数组 - Shortest Unsorted Continuous Subarray	C++	Java	Python3	Easy
580		C++	Java	Python3	Medium
579		C++	Java	Python3	Hard
578		C++	Java	Python3	Medium
577	员工奖金 - Employee Bonus	C++	Java	Python3	Easy
576	出界的路径数 - Out of Boundary Paths	C++	Java	Python3	Medium
575	分糖果 - Distribute Candies	C++	Java	Python3	Easy
574		C++	Java	Python3	Medium
573		C++	Java	Python3	Medium
572	另一个树的子树 - Subtree of Another Tree	C++	Java	Python3	Easy
571		C++	Java	Python3	Hard
570		C++	Java	Python3	Medium
569		C++	Java	Python3	Hard
568		C++	Java	Python3	Hard
567	字符串的排列 - Permutation in String	C++	Java	Python3	Medium
566	重塑矩阵 - Reshape the Matrix	C++	Java	Python3	Easy
565	数组嵌套 - Array Nesting	C++	Java	Python3	Medium
564	寻找最近的回文数 - Find the Closest Palindrome	C++	Java	Python3	Hard
563	二叉树的坡度 - Binary Tree Tilt	C++	Java	Python3	Easy
562		C++	Java	Python3	Medium
561	数组拆分 I - Array Partition I	C++	Java	Python3	Easy
560	和为K的子数组 - Subarray Sum Equals K	C++	Java	Python3	Medium
559		C++	Java	Python3	Easy
558		C++	Java	Python3	Easy
557	反转字符串中的单词 III - Reverse Words in a String III	C++	Java	Python3	Easy
556	下一个更大元素 III - Next Greater Element III	C++	Java	Python3	Medium
555		C++	Java	Python3	Medium
554	砖墙 - Brick Wall	C++	Java	Python3	Medium
553	最优除法 - Optimal Division	C++	Java	Python3	Medium
552	学生出勤记录 II - Student Attendance Record II	C++	Java	Python3	Hard
551	学生出勤纪录 I - Student Attendance Record I	C++	Java	Python3	Easy
550		C++	Java	Python3	Medium
549		C++	Java	Python3	Medium
548		C++	Java	Python3	Medium
547	朋友圈 - Friend Circles	C++	Java	Python3	Medium
546	移除盒子 - Remove Boxes	C++	Java	Python3	Hard
545		C++	Java	Python3	Medium
544		C++	Java	Python3	Medium
543	二叉树的直径 - Diameter of Binary Tree	C++	Java	Python3	Easy
542	01 矩阵 - 01 Matrix	C++	Java	Python3	Medium
541	反转字符串 II - Reverse String II	C++	Java	Python3	Easy
540	有序数组中的单一元素 - Single Element in a Sorted Array	C++	Java	Python3	Medium
539	最小时间差 - Minimum Time Difference	C++	Java	Python3	Medium
538	把二叉搜索树转换为累加树 - Convert BST to Greater Tree	C++	Java	Python3	Easy
537	复数乘法 - Complex Number Multiplication	C++	Java	Python3	Medium
536		C++	Java	Python3	Medium
535		C++	Java	Python3	Medium
534		C++	Java	Python3	Medium
533		C++	Java	Python3	Medium
532	数组中的K-diff数对 - K-diff Pairs in an Array	C++	Java	Python3	Easy
531		C++	Java	Python3	Medium
530	二叉搜索树的最小绝对差 - Minimum Absolute Difference in BST	C++	Java	Python3	Easy
529	扫雷游戏 - Minesweeper	C++	Java	Python3	Medium
528	按权重随机选择 - Random Pick with Weight	C++	Java	Python3	Medium
527		C++	Java	Python3	Hard
526	优美的排列 - Beautiful Arrangement	C++	Java	Python3	Medium
525	连续数组 - Contiguous Array	C++	Java	Python3	Medium
524	通过删除字母匹配到字典里最长单词 - Longest Word in Dictionary through Deleting	C++	Java	Python3	Medium
523	连续的子数组和 - Continuous Subarray Sum	C++	Java	Python3	Medium
522	最长特殊序列 II - Longest Uncommon Subsequence II	C++	Java	Python3	Medium
521	最长特殊序列 Ⅰ - Longest Uncommon Subsequence I	C++	Java	Python3	Easy
520	检测大写字母 - Detect Capital	C++	Java	Python3	Easy
519	随机翻转矩阵 - Random Flip Matrix	C++	Java	Python3	Medium
518	零钱兑换 II - Coin Change 2	C++	Java	Python3	Medium
517	超级洗衣机 - Super Washing Machines	C++	Java	Python3	Hard
516	最长回文子序列 - Longest Palindromic	C++	Java	Python3	Medium
515	在每个树行中找最大值 - Find Largest Value in Each Tree Row	C++	Java	Python3	Medium
514	自由之路 - Freedom Trail	C++	Java	Python3	Hard
513	找树左下角的值 - Find Bottom Left Tree Value	C++	Java	Python3	Medium
512		C++	Java	Python3	Medium
511		C++	Java	Python3	Medium
510		C++	Java	Python3	Medium
509	斐波那契数 - Fibonacci Number	C++	Java	Python3	Easy
508	出现次数最多的子树元素和 - Most Frequent Subtree Sum	C++	Java	Python3	Medium
507	完美数 - Perfect Number	C++	Java	Python3	Easy
506	相对名次 - Relative Ranks	C++	Java	Python3	Easy
505		C++	Java	Python3	Medium
504	七进制数 - Base 7	C++	Java	Python3	Easy
503	下一个更大元素 II - Next Greater Element II	C++	Java	Python3	Medium
502	IPO(首次公开募股) - Initial Public Offerings	C++	Java	Python3	Hard
501	二叉搜索树中的众数 - Find Mode in Binary Search Tree	C++	Java	Python3	Easy
500	键盘行 - Keyboard Row	C++	Java	Python3	Easy
499		C++	Java	Python3	Hard
498	对角线遍历 - Diagonal Traverse	C++	Java	Python3	Medium
497	非重叠矩形中的随机点 - Random Point in Non-overlapping Rectangles	C++	Java	Python3	Medium
496	下一个更大元素 I - Next Greater Element I	C++	Java	Python3	Easy
495	提莫攻击 - Teemo Attacking	C++	Java	Python3	Medium
494	目标和 - Target Sum	C++	Java	Python3	Medium
493	翻转对 - Reverse Pairs	C++	Java	Python3	Hard
492	构造矩形 - Construct the Rectangle	C++	Java	Python3	Easy
491	递增子序列 - Increasing Subsequences	C++	Java	Python3	Medium
490		C++	Java	Python3	Medium
489		C++	Java	Python3	Hard
488	祖玛游戏 - Zuma Game	C++	Java	Python3	Hard
487		C++	Java	Python3	Medium
486	预测赢家 - Predict the Winner	C++	Java	Python3	Medium
485	最大连续1的个数 - Max Consecutive Ones	C++	Java	Python3	Easy
484		C++	Java	Python3	Medium
483	最小好进制 - Smallest Good Base	C++	Java	Python3	Hard
482	密钥格式化 - License Key Formatting	C++	Java	Python3	Easy
481	神奇字符串 - Magical String	C++	Java	Python3	Medium
480	滑动窗口中位数 - Sliding Window Median	C++	Java	Python3	Hard
479	最大回文数乘积 - Largest Palindrome Product	C++	Java	Python3	Hard
478	在圆内随机生成点 - Generate Random Point in a Circle	C++	Java	Python3	Medium
477	汉明距离总和 - Total Hamming Distance	C++	Java	Python3	Medium
476	数字的补数 - Number Complement	C++	Java	Python3	Easy
475	供暖器 - Heaters	C++	Java	Python3	Easy
474	一和零 - Ones and Zeroes	C++	Java	Python3	Medium
473	火柴拼正方形 - Matchsticks to Square	C++	Java	Python3	Medium
472	连接词 - Concatenated Words	C++	Java	Python3	Hard
471		C++	Java	Python3	Hard
470	用 Rand7() 实现 Rand10() - Implement Rand10() Using Rand7()	C++	Java	Python3	Medium
469		C++	Java	Python3	Medium
468	验证IP地址 - Validate IP Address	C++	Java	Python3	Medium
467	环绕字符串中唯一的子字符串 - Unique Substrings in Wraparound String	C++	Java	Python3	Medium
466	统计重复个数 - Count The Repetitions	C++	Java	Python3	Hard
465		C++	Java	Python3	Hard
464	我能赢吗 - Can I Win	C++	Java	Python3	Medium
463	岛屿的周长 - Island Perimeter	C++	Java	Python3	Easy
462	最少移动次数使数组元素相等 II - Minimum Moves to Equal Array Elements II	C++	Java	Python3	Medium
461	汉明距离 - Hamming Distance	C++	Java	Python3	Easy
460	LFU缓存 - LFU Cache	C++	Java	Python3	Hard
459	重复的子字符串 - Repeated Substring Pattern	C++	Java	Python3	Easy
458	可怜的小猪 - Poor Pigs	C++	Java	Python3	Hard
457	环形数组循环 - Circular Array Loop	C++	Java	Python3	Medium
456	132模式 - 132 Pattern	C++	Java	Python3	Medium
455	分发饼干 - Assign Cookies	C++	Java	Python3	Easy
454	四数相加 II - 4Sum II	C++	Java	Python3	Medium
453	最小移动次数使数组元素相等 - Minimum Moves to Equal Array Elements	C++	Java	Python3	Easy
452	用最少数量的箭引爆气球 - Minimum Number of Arrows to Burst Balloons	C++	Java	Python3	Medium
451	根据字符出现频率排序 - Sort Characters By Frequency	C++	Java	Python3	Medium
450	删除二叉搜索树中的节点 - Delete Node in a BST	C++	Java	Python3	Medium
449		C++	Java	Python3	Medium
448	找到所有数组中消失的数字 - Find All Numbers Disappeared in an Array	C++	Java	Python3	Easy
447	回旋镖的数量 - Number of Boomerangs	C++	Java	Python3	Easy
446	等差数列划分 II - 子序列 - Arithmetic Slices II - Subsequence	C++	Java	Python3	Hard
445	两数相加 II - Add Two Numbers II	C++	Java	Python3	Medium
444		C++	Java	Python3	Medium
443	压缩字符串 - String Compression	C++	Java	Python3	Easy
442	数组中重复的数据 - Find All Duplicates in an Array	C++	Java	Python3	Medium
441	排列硬币 - Arranging Coins	C++	Java	Python3	Easy
440	字典序的第K小数字 - K-th Smallest in Lexicographical Order	C++	Java	Python3	Hard
439		C++	Java	Python3	Medium
438	找到字符串中所有字母异位词 - Find All Anagrams in a String	C++	Java	Python3	Easy
437	路径总和 III - Path Sum III	C++	Java	Python3	Easy
436	寻找右区间 - Find Right Interval	C++	Java	Python3	Medium
435	无重叠区间 - Non-overlapping Intervals	C++	Java	Python3	Medium
434	字符串中的单词数 - Number of Segments in a String	C++	Java	Python3	Easy
433	最小基因变化 - Minimum Genetic Mutation	C++	Java	Python3	Medium
432	全O(1) 的数据结构 - All O`one Data Structure	C++	Java	Python3	Hard
431		C++	Java	Python3	Hard
430		C++	Java	Python3	Medium
429		C++	Java	Python3	Easy
428		C++	Java	Python3	Hard
427		C++	Java	Python3	Easy
426		C++	Java	Python3	Medium
425		C++	Java	Python3	Hard
424	替换后的最长重复字符 - Longest Repeating Character Replacement	C++	Java	Python3	Medium
423	从英文中重建数字 - Reconstruct Original Digits from English	C++	Java	Python3	Medium
422		C++	Java	Python3	Easy
421	数组中两个数的最大异或值 - Maximum XOR of Two Numbers in an Array	C++	Java	Python3	Medium
420	强密码检验器 - Strong Password Checker	C++	Java	Python3	Hard
419	甲板上的战舰 - Battleships in a Board	C++	Java	Python3	Medium
418		C++	Java	Python3	Medium
417	太平洋大西洋水流问题 - Pacific Atlantic Water Flow	C++	Java	Python3	Medium
416	分割等和子集 - Partition Equal Subset Sum	C++	Java	Python3	Medium
415	字符串相加 - Add Strings	C++	Java	Python3	Easy
414	第三大的数 - Third Maximum Number	C++	Java	Python3	Easy
413	等差数列划分 - Arithmetic Slices	C++	Java	Python3	Medium
412	Fizz Buzz	C++	Java	Python3	Easy
411		C++	Java	Python3	Hard
410	分割数组的最大值 - Split Array Largest Sum	C++	Java	Python3	Hard
409	最长回文串 - Longest Palindrome	C++	Java	Python3	Easy
408		C++	Java	Python3	Easy
407	接雨水 II - Trapping Rain Water II	C++	Java	Python3	Hard
406	根据身高重建队列 - Queue Reconstruction by Height	C++	Java	Python3	Medium
405	数字转换为十六进制数 - Convert a Number to Hexadecimal	C++	Java	Python3	Easy
404	左叶子之和 - Sum of Left Leaves	C++	Java	Python3	Easy
403	青蛙过河 - Frog Jump	C++	Java	Python3	Hard
402	移掉K位数字 - Remove K Digits	C++	Java	Python3	Medium
401	二进制手表 - Binary Watch	C++	Java	Python3	Easy
400	第N个数字 - Nth Digit	C++	Java	Python3	Easy
399	除法求值 - Evaluate Division	C++	Java	Python3	Medium
398	随机数索引 - Random Pick Index	C++	Java	Python3	Medium
397	整数替换 - Integer Replacement	C++	Java	Python3	Medium
396	旋转函数 - Rotate Function	C++	Java	Python3	Medium
395	至少有K个重复字符的最长子串 - Longest Substring with At Least K Repeating Characters	C++	Java	Python3	Medium
394	字符串解码 - Decode String	C++	Java	Python3	Medium
393	UTF-8 编码验证 - UTF-8 Validation	C++	Java	Python3	Medium
392	判断子序列 - Is Subsequence	C++	Java	Python3	Medium
391	完美矩形 - Perfect Rectangle	C++	Java	Python3	Hard
390	消除游戏 - Elimination Game	C++	Java	Python3	Medium
389	找不同 - Find the Difference	C++	Java	Python3	Easy
388	文件的最长绝对路径 - Longest Absolute File Path	C++	Java	Python3	Medium
387	字符串中的第一个唯一字符 - First Unique Character in a String	C++	Java	Python3	Easy
386	字典序排数 - Lexicographical Numbers	C++	Java	Python3	Medium
385	迷你语法分析器 - Mini Parser	C++	Java	Python3	Medium
384	打乱数组 - Shuffle an Array	C++	Java	Python3	Medium
383	赎金信 - Ransom Note	C++	Java	Python3	Easy
382	链表随机节点 - Linked List Random Node	C++	Java	Python3	Medium
381	O(1) 时间插入、删除和获取随机元素 - 允许重复 - Insert Delete GetRandom O(1) - Duplicates allowed	C++	Java	Python3	Hard
380	常数时间插入、删除和获取随机元素 - Insert Delete GetRandom O(1)	C++	Java	Python3	Medium
379		C++	Java	Python3	Medium
378	有序矩阵中第K小的元素 - Kth Smallest Element in a Sorted Matrix	C++	Java	Python3	Medium
377	组合总和 Ⅳ - Combination Sum IV	C++	Java	Python3	Medium
376	摆动序列 - Wiggle Subsequence	C++	Java	Python3	Medium
375	猜数字大小 II - Guess Number Higher or Lower II	C++	Java	Python3	Medium
374	猜数字大小 - Guess Number Higher or Lower	C++	Java	Python3	Easy
373	查找和最小的K对数字 - Find K Pairs with Smallest Sums	C++	Java	Python3	Medium
372	超级次方 - Super Pow	C++	Java	Python3	Medium
371	两整数之和 - Sum of Two Integers	C++	Java	Python3	Easy
370		C++	Java	Python3	Medium
369		C++	Java	Python3	Medium
368	最大整除子集 - Largest Divisible Subset	C++	Java	Python3	Medium
367	有效的完全平方数 - Valid Perfect Square	C++	Java	Python3	Easy
366		C++	Java	Python3	Medium
365	水壶问题 - Water and Jug Problem	C++	Java	Python3	Medium
364		C++	Java	Python3	Medium
363	矩形区域不超过 K 的最大数值和 - Max Sum of Rectangle No Larger Than K	C++	Java	Python3	Hard
362		C++	Java	Python3	Medium
361		C++	Java	Python3	Medium
360		C++	Java	Python3	Medium
359		C++	Java	Python3	Easy
358		C++	Java	Python3	Hard
357	计算各个位数不同的数字个数 - Count Numbers with Unique Digits	C++	Java	Python3	Medium
356		C++	Java	Python3	Medium
355		C++	Java	Python3	Medium
354	俄罗斯套娃信封问题 - Russian Doll Envelopes	C++	Java	Python3	Hard
353		C++	Java	Python3	Medium
352	将数据流变为多个不相交间隔 - Data Stream as Disjoint Intervals	C++	Java	Python3	Hard
351	安卓解锁模式 $ Android Unlock Patterns	C++	Java	Python3	Medium
350	两个数组的交集 II - Intersection of Two Arrays II	C++	Java	Python3	Easy
349	两个数组的交集 - Intersection of Two Arrays	C++	Java	Python3	Easy
348	设计井字棋游戏 $ Design Tic-Tac-Toe	C++	Java	Python3	Medium
347	前K个高频元素 - Top K Frequent Elements	C++	Java	Python3	Medium
346	从数据流中移动平均值 $ Moving Average from Data Stream	C++	Java	Python3	Easy
345	反转字符串中的元音字母 - Reverse Vowels of a String	C++	Java	Python3	Easy
344	反转字符串 - Reverse String	C++	Java	Python3	Easy
343	整数拆分 - Integer Break	C++	Java	Python3	Medium
342	4的幂 - Power of Four	C++	Java	Python3	Easy
341	压平嵌套链表迭代器 - Flatten Nested List Iterator	C++	Java	Python3	Medium
340	最多有K个不同字符的最长子串 $ Longest Substring with At Most K Distinct Characters	C++	Java	Python3	Hard
339	嵌套链表权重和 $ Nested List Weight Sum	C++	Java	Python3	Easy
338	比特位计数 - Counting Bits	C++	Java	Python3	Medium
337	打家劫舍 III - House Robber III	C++	Java	Python3	Medium
336	回文对 - Palindrome Pairs	C++	Java	Python3	Hard
335	路径交叉 - Self Crossing	C++	Java	Python3	Hard
334	递增的三元子序列 - Increasing Triplet Subsequence	C++	Java	Python3	Medium
333	最大的二分搜索子树 $ Largest BST Subtree	C++	Java	Python3	Medium
332	重新安排行程 - Reconstruct Itinerary	C++	Java	Python3	Medium
331	验证二叉树的前序序列化 - Verify Preorder Serialization of a Binary Tree	C++	Java	Python3	Medium
330	按要求补齐数组 - Patching Array	C++	Java	Python3	Hard
329	矩阵中的最长递增路径 - Longest Increasing Path in a Matrix	C++	Java	Python3	Hard
328	奇偶链表 - Odd Even Linked List	C++	Java	Python3	Medium
327	区间和的个数 - Count of Range Sum	C++	Java	Python3	Hard
326	3的幂 - Power of Three	C++	Java	Python3	Easy
325	最大子数组之和为k $ Maximum Size Subarray Sum Equals k	C++	Java	Python3	Medium
324	摆动排序 II - Wiggle Sort II	C++	Java	Python3	Medium
323	无向图中的连通区域的个数 $ Number of Connected Components in an Undirected Graph	C++	Java	Python3	Medium
322	零钱兑换 - Coin Change	C++	Java	Python3	Medium
321	拼接最大数 - Create Maximum Number	C++	Java	Python3	Hard
320	通用简写 $ Generalized Abbreviation	C++	Java	Python3	Medium
319	灯泡开关 - Bulb Switcher	C++	Java	Python3	Medium
318	最大单词长度乘积 - Maximum Product of Word Lengths	C++	Java	Python3	Medium
317	建筑物的最短距离 $ Shortest Distance from All Buildings	C++	Java	Python3	Hard
316	去除重复字母 - Remove Duplicate Letters	C++	Java	Python3	Hard
315	计算右侧小于当前元素的个数 - Count of Smaller Numbers After Self	C++	Java	Python3	Hard
314	二叉树的竖直遍历 $ Binary Tree Vertical Order Traversal	C++	Java	Python3	Medium
313	超级丑数 - Super Ugly Number	C++	Java	Python3	Medium
312	戳气球 - Burst Balloons	C++	Java	Python3	Hard
311	稀疏矩阵相乘 $ Sparse Matrix Multiplication	C++	Java	Python3	Medium
310	最小高度树 - Minimum Height Trees	C++	Java	Python3	Medium
309	最佳买卖股票时机含冷冻期 - Best Time to Buy and Sell Stock with Cooldown	C++	Java	Python3	Medium
308	二维区域和检索 - 可变 $ Range Sum Query 2D - Mutable	C++	Java	Python3	Hard
307	区域和检索 - 数组可修改 - Range Sum Query - Mutable	C++	Java	Python3	Medium
306	累加数 - Additive Number	C++	Java	Python3	Medium
305	岛屿的个数 II $ Number of Islands II	C++	Java	Python3	Hard
304	二维区域和检索 - 矩阵不可变 - Range Sum Query 2D - Immutable	C++	Java	Python3	Medium
303	区域和检索 - 数组不可变 - Range Sum Query - Immutable	C++	Java	Python3	Easy
302	包含黑色像素的最小矩形 $ Smallest Rectangle Enclosing Black Pixels	C++	Java	Python3	Hard
301	删除无效的括号 - Remove Invalid Parentheses	C++	Java	Python3	Hard
300	最长上升子序列 - Longest Increasing Subsequence	C++	Java	Python3	Medium
299	猜数字游戏 - Bulls and Cows	C++	Java	Python3	Medium
298	二叉树最长连续序列 $ Binary Tree Longest Consecutive Sequence	C++	Java	Python3	Medium
297	二叉树的序列化与反序列化 - Serialize and Deserialize Binary Tree	C++	Java	Python3	Hard
296	最佳开会地点 $ Best Meeting Point	C++	Java	Python3	Hard
295	数据流的中位数 - Find Median from Data Stream	C++	Java	Python3	Hard
294	翻转游戏之 II $ Flip Game II	C++	Java	Python3	Medium
293	翻转游戏 $ Flip Game	C++	Java	Python3	Easy
292	Nim游戏 - Nim Game	C++	Java	Python3	Easy
291	单词模式 II $ Word Pattern II	C++	Java	Python3	Hard
290	单词模式 - Word Pattern	C++	Java	Python3	Easy
289	生命游戏 - Game of Life	C++	Java	Python3	Medium
288	唯一单词缩写 $ Unique Word Abbreviation	C++	Java	Python3	Medium
287	寻找重复数 - Find the Duplicate Number	C++	Java	Python3	Medium
286	墙和门 $ Walls and Gates	C++	Java	Python3	Medium
285	二叉搜索树中的中序后继节点 $ Inorder Successor in BST	C++	Java	Python3	Medium
284	顶端迭代器 - Peeking Iterator	C++	Java	Python3	Medium
283	移动零 - Move Zeroes	C++	Java	Python3	Easy
282	给表达式添加运算符 - Expression Add Operators	C++	Java	Python3	Hard
281	之字形迭代器 $ Zigzag Iterator	C++	Java	Python3	Medium
280	摆动排序 $ Wiggle Sort	C++	Java	Python3	Medium
279	完全平方数 - Perfect Squares	C++	Java	Python3	Medium
278	第一个错误的版本 - First Bad Version	C++	Java	Python3	Easy
277	寻找名人 $ Find the Celebrity	C++	Java	Python3	Medium
276	粉刷栅栏 $ Paint Fence	C++	Java	Python3	Easy
275	H指数 II - H-Index II	C++	Java	Python3	Medium
274	H指数 - H-Index	C++	Java	Python3	Medium
273	整数转换英文表示 - Integer to English Words	C++	Java	Python3	Hard
272	最近的二分搜索树的值 II $ Closest Binary Search Tree Value II	C++	Java	Python3	Hard
271	加码解码字符串 $ Encode and Decode Strings	C++	Java	Python3	Medium
270	最近的二分搜索树的值 $ Closest Binary Search Tree Value	C++	Java	Python3	Easy
269	外星人词典 $ Alien Dictionary	C++	Java	Python3	Hard
268	缺失数字 - Missing Number	C++	Java	Python3	Easy
267	回文全排列 II $ Palindrome Permutation II	C++	Java	Python3	Medium
266	回文全排列 $ Palindrome Permutation	C++	Java	Python3	Easy
265	粉刷房子 II $ Paint House II	C++	Java	Python3	Hard
264	丑数 II - Ugly Number II	C++	Java	Python3	Medium
263	丑数 - Ugly Number	C++	Java	Python3	Easy
262	行程和用户 - Trips and Users	C++	Java	Python3	Hard
261	图验证树 $ Graph Valid Tree	C++	Java	Python3	Medium
260	只出现一次的数字 III - Single Number III	C++	Java	Python3	Medium
259	三数之和较小值 $ 3Sum Smaller	C++	Java	Python3	Medium
258	各位相加 - Add Digits	C++	Java	Python3	Easy
257	二叉树的所有路径 - Binary Tree Paths	C++	Java	Python3	Easy
256	粉刷房子 $ Paint House	C++	Java	Python3	Easy
255	验证二叉搜索树的先序序列 $ Verify Preorder Sequence in Binary Search Tree	C++	Java	Python3	Medium
254	因子组合 $ Factor Combinations	C++	Java	Python3	Medium
253	会议室 II $ Meeting Rooms II	C++	Java	Python3	Medium
252	会议室 $ Meeting Rooms	C++	Java	Python3	Easy
251	展平二维向量 $ Flatten 2D Vector	C++	Java	Python3	Medium
250	计数相同值子树的个数 $ Count Univalue Subtrees	C++	Java	Python3	Medium
249	群组偏移字符串 $ Group Shifted Strings	C++	Java	Python3	Medium
248	对称数 III $ Strobogrammatic Number III	C++	Java	Python3	Hard
247	对称数 II $ Strobogrammatic Number II	C++	Java	Python3	Medium
246	对称数 $ Strobogrammatic Number	C++	Java	Python3	Easy
245	最短单词距离 III $ Shortest Word Distance III	C++	Java	Python3	Medium
244	最短单词距离 II $ Shortest Word Distance II	C++	Java	Python3	Medium
243	最短单词距离 $ Shortest Word Distance	C++	Java	Python3	Easy
242	有效的字母异位词 - Valid Anagram	C++	Java	Python3	Easy
241	为运算表达式设计优先级 - Different Ways to Add Parentheses	C++	Java	Python3	Medium
240	搜索二维矩阵 II - Search a 2D Matrix II	C++	Java	Python3	Medium
239	滑动窗口最大值 - Sliding Window Maximum	C++	Java	Python3	Hard
238	除自身以外数组的乘积 - Product of Array Except Self	C++	Java	Python3	Medium
237	删除链表中的节点 - Delete Node in a Linked List	C++	Java	Python3	Easy
236	二叉树的最近公共祖先 - Lowest Common Ancestor of a Binary Tree	C++	Java	Python3	Medium
235	二叉搜索树的最近公共祖先 - Lowest Common Ancestor of a Binary Search Tree	C++	Java	Python3	Easy
234	回文链表 - Palindrome Linked List	C++	Java	Python3	Easy
233	数字1的个数 - Number of Digit One	C++	Java	Python3	Hard
232	用栈实现队列 - Implement Queue using Stacks	C++	Java	Python3	Easy
231	2的幂 - Power of Two	C++	Java	Python3	Easy
230	二叉搜索树中第K小的元素 - Kth Smallest Element in a BST	C++	Java	Python3	Medium
229	求众数 II - Majority Element II	C++	Java	Python3	Medium
228	汇总区间 - Summary Ranges	C++	Java	Python3	Medium
227	基本计算器 II - Basic Calculator II	C++	Java	Python3	Medium
226	翻转二叉树 - Invert Binary Tree	C++	Java	Python3	Easy
225	用队列实现栈 - Implement Stack using Queues	C++	Java	Python3	Easy
224	基本计算器 - Basic Calculator	C++	Java	Python3	Hard
223	矩形面积 - Rectangle Area	C++	Java	Python3	Medium
222	完全二叉树的节点个数 - Count Complete Tree Nodes	C++	Java	Python3	Medium
221	最大正方形 - Maximal Square	C++	Java	Python3	Medium
220	存在重复元素 III - Contains Duplicate III	C++	Java	Python3	Medium
219	存在重复元素 II - Contains Duplicate II	C++	Java	Python3	Easy
218	天际线问题 - The Skyline Problem	C++	Java	Python3	Hard
217	存在重复元素 - Contains Duplicate	C++	Java	Python3	Easy
216	组合总和 III - Combination Sum III	C++	Java	Python3	Medium
215	数组中的第K个最大元素 - Kth Largest Element in an Array	C++	Java	Python3	Medium
214	最短回文串 - Shortest Palindrome	C++	Java	Python3	Hard
213	打家劫舍 II - House Robber II	C++	Java	Python3	Medium
212	单词搜索 II - Word Search II	C++	Java	Python3	Hard
211	添加与搜索单词 - 数据结构设计 - Add and Search Word - Data structure design	C++	Java	Python3	Medium
210	课程表 II - Course Schedule II	C++	Java	Python3	Medium
209	长度最小的子数组 - Minimum Size Subarray Sum	C++	Java	Python3	Medium
208	实现 Trie (前缀树) - Implement Trie (Prefix Tree)	C++	Java	Python3	Medium
207	课程表 - Course Schedule	C++	Java	Python3	Medium
206	反转链表 - Reverse Linked List	C++	Java	Python3	Easy
205	同构字符串 - Isomorphic Strings	C++	Java	Python3	Easy
204	计数质数 - Count Primes	C++	Java	Python3	Easy
203	移除链表元素 - Remove Linked List Elements	C++	Java	Python3	Easy
202	快乐数 - Happy Number	C++	Java	Python3	Easy
201	数字范围按位与 - Bitwise AND of Numbers Range	C++	Java	Python3	Medium
200	岛屿的个数 - Number of Islands	C++	Java	Python3	Medium
199	二叉树的右视图 - Binary Tree Right Side View	C++	Java	Python3	Medium
198	打家劫舍 - House Robber	C++	Java	Python3	Easy
197	上升的温度 - Rising Temperature	C++	Java	Python3	Easy
196	删除重复的电子邮箱 - Delete Duplicate Emails	C++	Java	Python3	Easy
195	第十行 - Tenth Line	C++	Java	Python3	Easy
194	转置文件 - Transpose File	C++	Java	Python3	Medium
193	有效电话号码 - Valid Phone Numbers	C++	Java	Python3	Easy
192	统计词频 - Word Frequency	C++	Java	Python3	Medium
191	位1的个数 - Number of 1 Bits	C++	Java	Python3	Easy
190	颠倒二进制位 - Reverse Bits	C++	Java	Python3	Easy
189	旋转数组 - Rotate Array	C++	Java	Python3	Easy
188	买卖股票的最佳时机 IV - Best Time to Buy and Sell Stock IV	C++	Java	Python3	Hard
187	重复的DNA序列 - Repeated DNA Sequences	C++	Java	Python3	Medium
186	翻转字符串中的单词 II $ Reverse Words in a String II	C++	Java	Python3	Medium
185	部门工资前三高的员工 - Department Top Three Salaries	C++	Java	Python3	Hard
184	部门工资最高的员工 - Department Highest Salary	C++	Java	Python3	Medium
183	从不订购的客户 - Customers Who Never Order	C++	Java	Python3	Easy
182	查找重复的电子邮箱 - Duplicate Emails	C++	Java	Python3	Easy
181	超过经理收入的员工 - Employees Earning More Than Their Managers	C++	Java	Python3	Easy
180	连续出现的数字 - Consecutive Numbers	C++	Java	Python3	Medium
179	最大数 - Largest Number	C++	Java	Python3	Medium
178	分数排名 - Rank Scores	C++	Java	Python3	Medium
177	第N高的薪水 - Nth Highest Salary	C++	Java	Python3	Medium
176	第二高的薪水 - Second Highest Salary	C++	Java	Python3	Easy
175	组合两个表 - Combine Two Tables	C++	Java	Python3	Easy
174	地下城游戏 - Dungeon Game	C++	Java	Python3	Hard
173	二叉搜索树迭代器 - Binary Search Tree Iterator	C++	Java	Python3	Medium
172	阶乘后的零 - Factorial Trailing Zeroes	C++	Java	Python3	Easy
171	Excel表列序号 - Excel Sheet Column Number	C++	Java	Python3	Easy
170	两数之和之三 - 数据结构设计 $ Two Sum III - Data structure design	C++	Java	Python3	Easy
169	求众数 - Majority Element	C++	Java	Python3	Easy
168	Excel表列名称 - Excel Sheet Column Title	C++	Java	Python3	Easy
167	两数之和 II - 输入有序数组 - Two Sum II - Input array is sorted	C++	Java	Python3	Easy
166	分数到小数 - Fraction to Recurring Decimal	C++	Java	Python3	Medium
165	比较版本号 - Compare Version Numbers	C++	Java	Python3	Medium
164	最大间距 - Maximum Gap	C++	Java	Python3	Hard
163	缺失区间 $ Missing Ranges	C++	Java	Python3	Medium
162	寻找峰值 - Find Peak Element	C++	Java	Python3	Medium
161	一次编辑距离 $ One Edit Distance	C++	Java	Python3	Medium
160	相交链表 - Intersection of Two Linked Lists	C++	Java	Python3	Easy
159	具有最多两个不同字符的最长子串 $ Longest Substring with At Most Two Distinct Characters	C++	Java	Python3	Hard
158	用Read4来读取N个字符II $ Read N Characters Given Read4 II	C++	Java	Python3	Hard
157	用Read4来读取N个字符 $ Read N Characters Given Read4	C++	Java	Python3	Easy
156	二叉树的上下颠倒 $ Binary Tree Upside Down	C++	Java	Python3	Medium
155	最小栈 - Min Stack	C++	Java	Python3	Easy
154	寻找旋转排序数组中的最小值 II - Find Minimum in Rotated Sorted Array II	C++	Java	Python3	Hard
153	寻找旋转排序数组中的最小值 - Find Minimum in Rotated Sorted Array	C++	Java	Python3	Medium
152	乘积最大子序列 - Maximum Product Subarray	C++	Java	Python3	Medium
151	翻转字符串里的单词 - Reverse Words in a String	C++	Java	Python3	Medium
150	逆波兰表达式求值 - Evaluate Reverse Polish Notation	C++	Java	Python3	Medium
149	直线上最多的点数 - Max Points on a Line	C++	Java	Python3	Hard
148	排序链表 - Sort List	C++	Java	Python3	Medium
147	对链表进行插入排序 - Insertion Sort List	C++	Java	Python3	Medium
146	LRU缓存机制 - LRU Cache	C++	Java	Python3	Hard
145	二叉树的后序遍历 - Binary Tree Postorder Traversal	C++	Java	Python3	Hard
144	二叉树的前序遍历 - Binary Tree Preorder Traversal	C++	Java	Python3	Medium
143	重排链表 - Reorder List	C++	Java	Python3	Medium
142	环形链表 II - Linked List Cycle II	C++	Java	Python3	Medium
141	环形链表 - Linked List Cycle	C++	Java	Python3	Easy
140	单词拆分 II - Word Break II	C++	Java	Python3	Hard
139	单词拆分 - Word Break	C++	Java	Python3	Medium
138	复制带随机指针的链表 - Copy List with Random Pointer	C++	Java	Python3	Medium
137	只出现一次的数字 II - Single Number II	C++	Java	Python3	Medium
136	只出现一次的数字 - Single Number	C++	Java	Python3	Easy
135	分发糖果 - Candy	C++	Java	Python3	Hard
134	加油站 - Gas Station	C++	Java	Python3	Medium
133	克隆图 - Clone Graph	C++	Java	Python3	Medium
132	分割回文串 II - Palindrome Partitioning II	C++	Java	Python3	Hard
131	分割回文串 - Palindrome Partitioning	C++	Java	Python3	Medium
130	被围绕的区域 - Surrounded Regions	C++	Java	Python3	Medium
129	求根到叶子节点数字之和 - Sum Root to Leaf Numbers	C++	Java	Python3	Medium
128	最长连续序列 - Longest Consecutive Sequence	C++	Java	Python3	Hard
127	单词接龙 - Word Ladder	C++	Java	Python3	Medium
126	单词接龙 II - Word Ladder II	C++	Java	Python3	Hard
125	验证回文串 - Valid Palindrome	C++	Java	Python3	Easy
124	二叉树中的最大路径和 - Binary Tree Maximum Path Sum	C++	Java	Python3	Hard
123	买卖股票的最佳时机 III - Best Time to Buy and Sell Stock III	C++	Java	Python3	Hard
122	买卖股票的最佳时机 II - Best Time to Buy and Sell Stock II	C++	Java	Python3	Easy
121	买卖股票的最佳时机 I - Best Time to Buy and Sell Stock	C++	Java	Python3	Easy
120	三角形最小路径和 - Triangle	C++	Java	Python3	Medium
119	杨辉三角 II - Pascal's Triangle II	C++	Java	Python3	Easy
118	杨辉三角 - Pascal's Triangle	C++	Java	Python3	Easy
117	填充同一层的兄弟节点 II - Populating Next Right Pointers in Each Node II	C++	Java	Python3	Medium
116	填充同一层的兄弟节点 - Populating Next Right Pointers in Each Node	C++	Java	Python3	Medium
115	不同的子序列 - Distinct Subsequences	C++	Java	Python3	Hard
114	二叉树展开为链表 - Flatten Binary Tree to Linked List	C++	Java	Python3	Medium
113	路径总和 II - Path Sum II	C++	Java	Python3	Medium
112	路径总和 - Path Sum	C++	Java	Python3	Easy
111	二叉树的最小深度 - Minimum Depth of Binary Tree	C++	Java	Python3	Easy
110	平衡二叉树 - Balanced Binary Tree	C++	Java	Python3	Easy
109	有序链表转换二叉搜索树 - Convert Sorted List to Binary Search Tree	C++	Java	Python3	Medium
108	将有序数组转换为二叉搜索树 - Convert Sorted Array to Binary Search Tree	C++	Java	Python3	Easy
107	二叉树的层次遍历 II - Binary Tree Level Order Traversal II	C++	Java	Python3	Easy
106	从中序与后序遍历序列构造二叉树 - Construct Binary Tree from Inorder and Postorder Traversal	C++	Java	Python3	Medium
105	从前序与中序遍历序列构造二叉树 - Construct Binary Tree from Preorder and Inorder Traversal	C++	Java	Python3	Medium
104	二叉树的最大深度 - Maximum Depth of Binary Tree	C++	Java	Python3	Easy
103	二叉树的锯齿形层次遍历 - Binary Tree Zigzag Level Order Traversal	C++	Java	Python3	Medium
102	二叉树的层次遍历 - Binary Tree Level Order Traversal	C++	Java	Python3	Medium
101	对称二叉树 - Symmetric Tree	C++	Java	Python3	Easy
100	相同的树 - Same Tree	C++	Java	Python3	Hard
99	恢复二叉搜索树 - Recover Binary Search Tree	C++	Java	Python3	Medium
98	验证二叉搜索树 - Validate Binary Search Tree	C++	Java	Python3	Medium
97	交错字符串 - Interleaving String	C++	Java	Python3	Medium
96	不同的二叉搜索树 - Unique Binary Search Trees	C++	Java	Python3	Medium
95	不同的二叉搜索树 II - Unique Binary Search Trees II	C++	Java	Python3	Medium
94	二叉树的中序遍历 - Binary Tree Inorder Traversal	C++	Java	Python3	Medium
93	复原IP地址 - Restore IP Addresses	C++	Java	Python3	Medium
92	反转链表 II - Reverse Linked List II	C++	Java	Python3	Medium
91	解码方法 - Decode Ways	C++	Java	Python3	Medium
90	子集 II - Subsets II	C++	Java	Python3	Medium
89	格雷编码 - Gray Code	C++	Java	Python3	Medium
88	合并两个有序数组 - Merge Sorted Array	C++	Java	Python3	Easy
87	扰乱字符串 - Scramble String	C++	Java	Python3	Hard
86	分隔链表 - Partition List	C++	Java	Python3	Medium
85	最大矩形 - Maximal Rectangle	C++	Java	Python3	Hard
84	柱状图中最大的矩形 - Largest Rectangle in Histogram	C++	Java	Python3	Hard
83	删除排序链表中的重复元素 - Remove Duplicates from Sorted List	C++	Java	Python3	Easy
82	删除排序链表中的重复元素 II - Remove Duplicates from Sorted List II	C++	Java	Python3	Medium
81	搜索旋转排序数组 II - Search in Rotated Sorted Array II	C++	Java	Python3	Medium
80	删除排序数组中的重复项 II - Remove Duplicates from Sorted Array II	C++	Java	Python3	Medium
79	单词搜索 - Word Search	C++	Java	Python3	Medium
78	子集 - Subsets	C++	Java	Python3	Medium
77	组合 - Combinations	C++	Java	Python3	Medium
76	最小覆盖子串 - Minimum Window Substring	C++	Java	Python3	Hard
75	颜色分类 - Sort Colors	C++	Java	Python3	Medium
74	搜索二维矩阵 - Search a 2D Matrix	C++	Java	Python3	Medium
73	矩阵置零 - Set Matrix Zeroes	C++	Java	Python3	Medium
72	编辑距离 - Edit Distance	C++	Java	Python3	Hard
71	简化路径 - Simplify Path	C++	Java	Python3	Medium
70	爬楼梯 - Climbing Stairs	C++	Java	Python3	Easy
69	x 的平方根 - Sqrt(x)	C++	Java	Python3	Easy
68	文本左右对齐 - Text Justification	C++	Java	Python3	Hard
67	二进制求和 - Add Binary	C++	Java	Python3	Easy
66	加一 - Plus One	C++	Java	Python3	Easy
65	有效数字 - Valid Number	C++	Java	Python3	Hard
64	最小路径和 - Minimum Path Sum	C++	Java	Python3	Medium
63	不同路径 II - Unique Paths II	C++	Java	Python3	Medium
62	不同路径 - Unique Paths	C++	Java	Python3	Medium
61	旋转链表 - Rotate List	C++	Java	Python3	Medium
60	第k个排列 - Permutation Sequence	C++	Java	Python3	Medium
59	螺旋矩阵 II - Spiral Matrix II	C++	Java	Python3	Medium
58	最后一个单词的长度 - Length of Last Word	C++	Java	Python3	Easy
57	插入区间 - Insert Interval	C++	Java	Python3	Hard
56	合并区间 - Merge Intervals	C++	Java	Python3	Medium
55	跳跃游戏 - Jump Game	C++	Java	Python3	Medium
54	螺旋矩阵 - Spiral Matrix	C++	Java	Python3	Medium
53	最大子序和 - Maximum Subarray	C++	Java	Python3	Easy
52	N皇后 II - N-Queens II	C++	Java	Python3	Hard
51	N皇后 - N-Queens	C++	Java	Python3	Hard
50	Pow(x, n) - Pow(x, n)	C++	Java	Python3	Medium
49	字母异位词分组 - Group Anagrams	C++	Java	Python3	Medium
48	旋转图像 - Rotate Image	C++	Java	Python3	Medium
47	全排列 II - Permutations II	C++	Java	Python3	Medium
46	全排列 - Permutations	C++	Java	Python3	Medium
45	跳跃游戏 II - Jump Game II	C++	Java	Python3	Hard
44	通配符匹配 - Wildcard Matching	C++	Java	Python3	Hard
43	字符串相乘 - Multiply Strings	C++	Java	Python3	Medium
42	接雨水 - Trapping Rain Water	C++	Java	Python3	Hard
41	缺失的第一个正数 - First Missing Positive	C++	Java	Python3	Hard
40	组合总和 II - Combination Sum II	C++	Java	Python3	Medium
39	组合总和 - Combination Sum	C++	Java	Python3	Medium
38	报数 - Count and Say	C++	Java	Python3	Easy
37	解数独 - Sudoku Solver	C++	Java	Python3	Hard
36	有效的数独 - Valid Sudoku	C++	Java	Python3	Medium
35	搜索插入位置 - Search Insert Position	C++	Java	Python3	Easy
34	在排序数组中查找元素的第一个和最后一个位置 - Find First and Last Position of Element in Sorted Array	C++	Java	Python3	Medium
33	搜索旋转排序数组 - Search in Rotated Sorted Array	C++	Java	Python3	Medium
32	最长有效括号 - Longest Valid Parentheses	C++	Java	Python3	Hard
31	下一个排列 - Next Permutation	C++	Java	Python3	Medium
30	与所有单词相关联的字串 - Substring with Concatenation of All Words	C++	Java	Python3	Hard
29	两数相除 - Divide Two Integers	C++	Java	Python3	Medium
28	实现strStr() - Implement strStr()	C++	Java	Python3	Easy
27	移除元素 - Remove Element	C++	Java	Python3	Easy
26	删除排序数组中的重复项 - Remove Duplicates from Sorted Array	C++	Java	Python3	Easy
25	k个一组翻转链表 - Reverse Nodes in k-Group	C++	Java	Python3	Hard
24	两两交换链表中的节点 - Swap Nodes in Pairs	C++	Java	Python3	Medium
23	合并K个排序链表 - Merge k Sorted Lists	C++	Java	Python3	Hard
22	括号生成 - Generate Parentheses	C++	Java	Python3	Medium
21	合并两个有序链表 - Merge Two Sorted Lists	C++	Java	Python3	Easy
20	有效的括号 - Valid Parentheses	C++	Java	Python3	Easy
19	删除链表的倒数第N个节点 - Remove Nth Node From End of List	C++	Java	Python3	Medium
18	四数之和 - 4Sum	C++	Java	Python3	Medium
17	电话号码的字母组合 - Letter Combinations of a Phone Number	C++	Java	Python3	Medium
16	最接近的三数之和 - 3Sum Closest	C++	Java	Python3	Medium
15	三数之和 - 3Sum	C++	Java	Python3	Medium
14	最长公共前缀 - Longest Common Prefix	C++	Java	Python3	Easy
13	罗马数字转整数 - Roman to Integer	C++	Java	Python3	Easy
12	整数转罗马数字 - Integer to Roman	C++	Java	Python3	Medium
11	盛最多水的容器 - Container With Most Water	C++	Java	Python3	Medium
10	正则表达式匹配 - Regular Expression Matching	C++	Java	Python3	Hard
9	回文数 - Palindrome Number	C++	Java	Python3	Easy
8	字符串转整数 (atoi) - String to Integer (atoi)	C++	Java	Python3	Medium
7	反转整数 - Reverse Integer	C++	Java	Python3	Easy
6	Z字形变换 - ZigZag Conversion	C++	Java	Python3	Medium
5	最长回文子串 - Longest Palindromic Substring	C++	Java	Python3	Medium
4	两个排序数组的中位数 - Median of Two Sorted Arrays	C++	Java	Python3	Hard
3	无重复字符的最长子串 - Longest Substring Without Repeating Characters	C++	Java	Python3	Medium
2	两数相加 - Add Two Numbers	C++	Java	Python3	Medium
1	两数之和 - Two Sum	C++	Java	Python3	Easy