feat: restructure solution structure

Change-Id: I492aeb8f0490f5aae06cd7c5f91842a6be8094b1
franklingu · Jan 30, 2021 · 5e3dd2a · 5e3dd2a
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diff --git a/README.md b/README.md
diff --git a/download_solutions.py b/download_solutions.py
@@ -0,0 +1,145 @@
+#!/usr/bin/env python
+"""download solutions from leetcode account
+"""
+import os
+from os import path
+import re
+
+import requests
+from bs4 import BeautifulSoup
+
+
+extension_mapping = {
+    'cpp': 'cpp',
+    'python': 'py',
+    'python3': 'py',
+    'java': 'java',
+    'sql': 'sql',
+    'shell': 'sh',
+}
+comment_mapping = {
+    'cpp': ['/*', '*/'],
+    'python': ['"""', '"""'],
+    'python3': ['"""', '"""'],
+    'java': ['/*', '*/'],
+    'sql': ['/*', '*/'],
+    'shell': [": '", "'"],
+}
+cookie = ''
+
+
+def get_question_meta(session):
+    res = session.get('https://leetcode.com/api/problems/all/')
+    total = res.json()['stat_status_pairs']
+    return [stat for stat in total if stat.get('status') == 'ac' and not stat.get('paid')]
+
+
+def get_question(session, question_meta):
+    res = session.post('https://leetcode.com/graphql', json={
+        "operationName": "questionData",
+        "variables": {
+            "titleSlug": question_meta['stat']['question__title_slug']
+        },
+        "query": "query questionData($titleSlug: String!) {\n  question(titleSlug: $titleSlug) {\n    questionId\n    questionFrontendId\n    boundTopicId\n    title\n    titleSlug\n    content\n    translatedTitle\n    translatedContent\n    isPaidOnly\n    difficulty\n    likes\n    dislikes\n    isLiked\n    similarQuestions\n    exampleTestcases\n    contributors {\n      username\n      profileUrl\n      avatarUrl\n      __typename\n    }\n    topicTags {\n      name\n      slug\n      translatedName\n      __typename\n    }\n    companyTagStats\n    codeSnippets {\n      lang\n      langSlug\n      code\n      __typename\n    }\n    stats\n    hints\n    solution {\n      id\n      canSeeDetail\n      paidOnly\n      hasVideoSolution\n      paidOnlyVideo\n      __typename\n    }\n    status\n    sampleTestCase\n    metaData\n    judgerAvailable\n    judgeType\n    mysqlSchemas\n    enableRunCode\n    enableTestMode\n    enableDebugger\n    envInfo\n    libraryUrl\n    adminUrl\n    __typename\n  }\n}\n",
+    })
+    content = res.json()['data']['question']['content']
+    question = '<html>{}</html>'.format(content)
+    soup = BeautifulSoup(question, features="html.parser")
+    return soup.get_text()
+
+
+def get_solution(session, question_meta):
+    res = session.post('https://leetcode.com/graphql', json={
+        "operationName": "Submissions",
+        "variables": {
+            "offset": 0,
+            "limit": 20,
+            "lastKey": None,
+            "questionSlug": question_meta['stat']['question__title_slug']
+        },
+        "query": "query Submissions($offset: Int!, $limit: Int!, $lastKey: String, $questionSlug: String!) {\n  submissionList(offset: $offset, limit: $limit, lastKey: $lastKey, questionSlug: $questionSlug) {\n    lastKey\n    hasNext\n    submissions {\n      id\n      statusDisplay\n      lang\n      runtime\n      timestamp\n      url\n      isPending\n      memory\n      __typename\n    }\n    __typename\n  }\n}\n"
+    })
+    submissions = res.json()['data']['submissionList']['submissions']
+    selected = None
+    lang = None
+    for submission in submissions:
+        lang = submission['lang']
+        status = submission['statusDisplay']
+        if status == 'Accepted':
+            selected = submission
+            break
+    if selected is None:
+        return None
+    res = session.get('https://leetcode.com{}'.format(selected['url']))
+    code_line = ''
+    for line in res.text.split('\n'):
+        if 'submissionCode:' in line:
+            code_line = line
+            break
+    match = re.search("submissionCode: '(.+)'", code_line)
+    if match is None:
+        print('cannot find solution: ', question_meta['stat']['question__title'])
+        return None, None
+    code_line = match.group(1)
+    code_line = code_line.encode('utf-8').decode('unicode-escape')
+    return code_line, lang
+
+
+def solution_exists(question_meta, lang):
+    if lang not in extension_mapping:
+        print('unknown lang', lang)
+        return True
+    title = question_meta['stat']['question__title']
+    title_slug = question_meta['stat']['question__title_slug']
+    link = 'https://leetcode.com/problems/{}/'.format(title_slug)
+    # difficulty = question_meta['stat']['difficulty']['level']
+    target_dir = './questions/{}/'.format(title_slug)
+    if not path.exists(target_dir):
+        os.makedirs(target_dir)
+    else:
+        return True
+    filepath = '{}{}.{}'.format(target_dir, 'Solution', extension_mapping[lang])
+    if path.exists(filepath):
+        return True
+    return False
+
+
+def output_solution(question_meta, question, solution, lang):
+    title_slug = question_meta['stat']['question__title_slug']
+    target_dir = './questions/{}/'.format(title_slug)
+    filepath = '{}{}.{}'.format(target_dir, 'Solution', extension_mapping[lang])
+    opening, closing = comment_mapping[lang]
+    with open(filepath, 'w') as ofile:
+        ofile.write(opening + '\n')
+        ofile.write('\n')
+        ofile.write(question)
+        ofile.write('\n')
+        ofile.write(closing + '\n')
+        ofile.write('\n\n')
+        ofile.write(solution)
+    return True
+
+
+
+def main():
+    with requests.Session() as session:
+        session.headers.update({'Cookie': cookie})
+        question_metas = get_question_meta(session)
+        for question_meta in question_metas:
+            if solution_exists(question_meta, 'python'):
+                continue
+            question = get_question(session, question_meta)
+            solution, lang = get_solution(session, question_meta)
+            if solution is None:
+                continue
+            outputed = output_solution(question_meta, question, solution, lang)
+            title = question_meta['stat']['question__title']
+            if not outputed:
+                print('ignore:', title)
+            else:
+                print('output:', title)
+
+
+
+if __name__ == '__main__':
+    main()
diff --git a/...ms/1-bit-and-2-bit-characters/Solution.py → ...ns/1-bit-and-2-bit-characters/Solution.py b/...ms/1-bit-and-2-bit-characters/Solution.py → ...ns/1-bit-and-2-bit-characters/Solution.py
diff --git a/algorithms/3sum-closest/Solution.java → questions/3sum-closest/Solution.java b/algorithms/3sum-closest/Solution.java → questions/3sum-closest/Solution.java
diff --git a/algorithms/3sum/Solution.java → questions/3sum/Solution.java b/algorithms/3sum/Solution.java → questions/3sum/Solution.java
diff --git a/algorithms/3sum/Solution.py → questions/3sum/Solution.py b/algorithms/3sum/Solution.py → questions/3sum/Solution.py
diff --git a/...ch-word-data-structure-design/Solution.py → ...ch-word-data-structure-design/Solution.py b/...ch-word-data-structure-design/Solution.py → ...ch-word-data-structure-design/Solution.py
diff --git a/algorithms/add-binary/Solution.java → questions/add-binary/Solution.java b/algorithms/add-binary/Solution.java → questions/add-binary/Solution.java
diff --git a/algorithms/add-digits/Solution.cpp → questions/add-digits/Solution.cpp b/algorithms/add-digits/Solution.cpp → questions/add-digits/Solution.cpp
diff --git a/algorithms/add-two-numbers-ii/Solution.py → questions/add-two-numbers-ii/Solution.py b/algorithms/add-two-numbers-ii/Solution.py → questions/add-two-numbers-ii/Solution.py
diff --git a/algorithms/add-two-numbers/Solution.java → questions/add-two-numbers/Solution.java b/algorithms/add-two-numbers/Solution.java → questions/add-two-numbers/Solution.java
diff --git a/algorithms/add-two-numbers/Solution.py → questions/add-two-numbers/Solution.py b/algorithms/add-two-numbers/Solution.py → questions/add-two-numbers/Solution.py
diff --git a/...ll-possible-full-binary-trees/Solution.py → ...ll-possible-full-binary-trees/Solution.py b/...ll-possible-full-binary-trees/Solution.py → ...ll-possible-full-binary-trees/Solution.py
diff --git a/...ngle-between-hands-of-a-clock/Solution.py → ...ngle-between-hands-of-a-clock/Solution.py b/...ngle-between-hands-of-a-clock/Solution.py → ...ngle-between-hands-of-a-clock/Solution.py
diff --git a/algorithms/array-partition-i/Solution.py → questions/array-partition-i/Solution.py b/algorithms/array-partition-i/Solution.py → questions/array-partition-i/Solution.py
diff --git a/...thms/backspace-string-compare/Solution.py → ...ions/backspace-string-compare/Solution.py b/...thms/backspace-string-compare/Solution.py → ...ions/backspace-string-compare/Solution.py
diff --git a/...rithms/balanced-binary-tree/Solution.java → questions/balanced-binary-tree/Solution.java b/...rithms/balanced-binary-tree/Solution.java → questions/balanced-binary-tree/Solution.java
diff --git a/algorithms/baseball-game/Solution.py → questions/baseball-game/Solution.py b/algorithms/baseball-game/Solution.py → questions/baseball-game/Solution.py
diff --git a/algorithms/basic-calculator-ii/Solution.py → questions/basic-calculator-ii/Solution.py b/algorithms/basic-calculator-ii/Solution.py → questions/basic-calculator-ii/Solution.py
diff --git a/...time-to-buy-and-sell-stock-iv/Solution.py → ...time-to-buy-and-sell-stock-iv/Solution.py b/...time-to-buy-and-sell-stock-iv/Solution.py → ...time-to-buy-and-sell-stock-iv/Solution.py
diff --git a/...st-time-to-buy-and-sell-stock/Solution.py → ...st-time-to-buy-and-sell-stock/Solution.py b/...st-time-to-buy-and-sell-stock/Solution.py → ...st-time-to-buy-and-sell-stock/Solution.py
diff --git a/databases/big-countries/Solution.sql → questions/big-countries/Solution.sql b/databases/big-countries/Solution.sql → questions/big-countries/Solution.sql
diff --git a/algorithms/binary-gap/Solution.py → questions/binary-gap/Solution.py b/algorithms/binary-gap/Solution.py → questions/binary-gap/Solution.py
diff --git a/...-number-with-alternating-bits/Solution.py → ...-number-with-alternating-bits/Solution.py b/...-number-with-alternating-bits/Solution.py → ...-number-with-alternating-bits/Solution.py
diff --git a/...s/binary-search-tree-iterator/Solution.py → ...s/binary-search-tree-iterator/Solution.py b/...s/binary-search-tree-iterator/Solution.py → ...s/binary-search-tree-iterator/Solution.py
diff --git a/algorithms/binary-search/Solution.py → questions/binary-search/Solution.py b/algorithms/binary-search/Solution.py → questions/binary-search/Solution.py
diff --git a/...ee-level-order-traversal-ii/Solution.java → ...ee-level-order-traversal-ii/Solution.java b/...ee-level-order-traversal-ii/Solution.java → ...ee-level-order-traversal-ii/Solution.java
diff --git a/...-tree-level-order-traversal/Solution.java → ...-tree-level-order-traversal/Solution.java b/...-tree-level-order-traversal/Solution.java → ...-tree-level-order-traversal/Solution.java
diff --git a/...ry-tree-level-order-traversal/Solution.py → ...ry-tree-level-order-traversal/Solution.py b/...ry-tree-level-order-traversal/Solution.py → ...ry-tree-level-order-traversal/Solution.py
diff --git a/algorithms/binary-tree-paths/Solution.java → questions/binary-tree-paths/Solution.java b/algorithms/binary-tree-paths/Solution.java → questions/binary-tree-paths/Solution.java
diff --git a/...nary-tree-postorder-traversal/Solution.py → ...nary-tree-postorder-traversal/Solution.py b/...nary-tree-postorder-traversal/Solution.py → ...nary-tree-postorder-traversal/Solution.py
diff --git a/...inary-tree-preorder-traversal/Solution.py → ...inary-tree-preorder-traversal/Solution.py b/...inary-tree-preorder-traversal/Solution.py → ...inary-tree-preorder-traversal/Solution.py
diff --git a/...s/binary-tree-right-side-view/Solution.py → ...s/binary-tree-right-side-view/Solution.py b/...s/binary-tree-right-side-view/Solution.py → ...s/binary-tree-right-side-view/Solution.py
diff --git a/...-zigzag-level-order-traversal/Solution.py → ...-zigzag-level-order-traversal/Solution.py b/...-zigzag-level-order-traversal/Solution.py → ...-zigzag-level-order-traversal/Solution.py
diff --git a/.../bitwise-and-of-numbers-range/Solution.py → .../bitwise-and-of-numbers-range/Solution.py b/.../bitwise-and-of-numbers-range/Solution.py → .../bitwise-and-of-numbers-range/Solution.py
diff --git a/algorithms/boats-to-save-people/Solution.py → questions/boats-to-save-people/Solution.py b/algorithms/boats-to-save-people/Solution.py → questions/boats-to-save-people/Solution.py
diff --git a/algorithms/buddy-strings/Solution.py → questions/buddy-strings/Solution.py b/algorithms/buddy-strings/Solution.py → questions/buddy-strings/Solution.py
diff --git a/algorithms/bulls-and-cows/Solution.java → questions/bulls-and-cows/Solution.java b/algorithms/bulls-and-cows/Solution.java → questions/bulls-and-cows/Solution.java
diff --git a/algorithms/can-place-flowers/Solution.java → questions/can-place-flowers/Solution.java b/algorithms/can-place-flowers/Solution.java → questions/can-place-flowers/Solution.java
diff --git a/algorithms/candy/Solution.py → questions/candy/Solution.py b/algorithms/candy/Solution.py → questions/candy/Solution.py
diff --git a/...completeness-of-a-binary-tree/Solution.py → ...completeness-of-a-binary-tree/Solution.py b/...completeness-of-a-binary-tree/Solution.py → ...completeness-of-a-binary-tree/Solution.py
diff --git a/...heck-if-it-is-a-straight-line/Solution.py → ...heck-if-it-is-a-straight-line/Solution.py b/...heck-if-it-is-a-straight-line/Solution.py → ...heck-if-it-is-a-straight-line/Solution.py
diff --git a/...classes-more-than-5-students/Solution.sql → ...classes-more-than-5-students/Solution.sql b/...classes-more-than-5-students/Solution.sql → ...classes-more-than-5-students/Solution.sql
diff --git a/algorithms/climbing-stairs/Solution.java → questions/climbing-stairs/Solution.java b/algorithms/climbing-stairs/Solution.java → questions/climbing-stairs/Solution.java
diff --git a/algorithms/combination-sum-ii/Solution.py → questions/combination-sum-ii/Solution.py b/algorithms/combination-sum-ii/Solution.py → questions/combination-sum-ii/Solution.py
diff --git a/algorithms/combination-sum-iii/Solution.py → questions/combination-sum-iii/Solution.py b/algorithms/combination-sum-iii/Solution.py → questions/combination-sum-iii/Solution.py
diff --git a/algorithms/combination-sum/Solution.java → questions/combination-sum/Solution.java b/algorithms/combination-sum/Solution.java → questions/combination-sum/Solution.java
diff --git a/algorithms/combination-sum/Solution.py → questions/combination-sum/Solution.py b/algorithms/combination-sum/Solution.py → questions/combination-sum/Solution.py
diff --git a/algorithms/combinations/Solution.java → questions/combinations/Solution.java b/algorithms/combinations/Solution.java → questions/combinations/Solution.java
diff --git a/algorithms/combinations/Solution.py → questions/combinations/Solution.py b/algorithms/combinations/Solution.py → questions/combinations/Solution.py
diff --git a/databases/combine-two-tables/Solution.sql → questions/combine-two-tables/Solution.sql b/databases/combine-two-tables/Solution.sql → questions/combine-two-tables/Solution.sql
diff --git a/...hms/compare-version-numbers/Solution.java → ...ons/compare-version-numbers/Solution.java b/...hms/compare-version-numbers/Solution.java → ...ons/compare-version-numbers/Solution.java
diff --git a/...ithms/compare-version-numbers/Solution.py → ...tions/compare-version-numbers/Solution.py b/...ithms/compare-version-numbers/Solution.py → ...tions/compare-version-numbers/Solution.py
diff --git a/...complement-of-base-10-integer/Solution.py → ...complement-of-base-10-integer/Solution.py b/...complement-of-base-10-integer/Solution.py → ...complement-of-base-10-integer/Solution.py
diff --git a/databases/consecutive-numbers/Solution.sql → questions/consecutive-numbers/Solution.sql b/databases/consecutive-numbers/Solution.sql → questions/consecutive-numbers/Solution.sql
diff --git a/...order-and-postorder-traversal/Solution.py → ...order-and-postorder-traversal/Solution.py b/...order-and-postorder-traversal/Solution.py → ...order-and-postorder-traversal/Solution.py
diff --git a/...reorder-and-inorder-traversal/Solution.py → ...reorder-and-inorder-traversal/Solution.py b/...reorder-and-inorder-traversal/Solution.py → ...reorder-and-inorder-traversal/Solution.py
diff --git a/...s/container-with-most-water/Solution.java → ...s/container-with-most-water/Solution.java b/...s/container-with-most-water/Solution.java → ...s/container-with-most-water/Solution.java
diff --git a/...hms/container-with-most-water/Solution.py → ...ons/container-with-most-water/Solution.py b/...hms/container-with-most-water/Solution.py → ...ons/container-with-most-water/Solution.py
diff --git a/...ithms/contains-duplicate-ii/Solution.java → ...tions/contains-duplicate-ii/Solution.java b/...ithms/contains-duplicate-ii/Solution.java → ...tions/contains-duplicate-ii/Solution.java
diff --git a/algorithms/contains-duplicate-ii/Solution.py → questions/contains-duplicate-ii/Solution.py b/algorithms/contains-duplicate-ii/Solution.py → questions/contains-duplicate-ii/Solution.py
diff --git a/...rithms/contains-duplicate-iii/Solution.py → questions/contains-duplicate-iii/Solution.py b/...rithms/contains-duplicate-iii/Solution.py → questions/contains-duplicate-iii/Solution.py
diff --git a/algorithms/contains-duplicate/Solution.java → questions/contains-duplicate/Solution.java b/algorithms/contains-duplicate/Solution.java → questions/contains-duplicate/Solution.java
diff --git a/algorithms/contains-duplicate/Solution.py → questions/contains-duplicate/Solution.py b/algorithms/contains-duplicate/Solution.py → questions/contains-duplicate/Solution.py
diff --git a/...convert-bst-to-greater-tree/Solution.java → ...convert-bst-to-greater-tree/Solution.java b/...convert-bst-to-greater-tree/Solution.java → ...convert-bst-to-greater-tree/Solution.java
diff --git a/...d-array-to-binary-search-tree/Solution.py → ...d-array-to-binary-search-tree/Solution.py b/...d-array-to-binary-search-tree/Solution.py → ...d-array-to-binary-search-tree/Solution.py
diff --git a/...ed-list-to-binary-search-tree/Solution.py → ...ed-list-to-binary-search-tree/Solution.py b/...ed-list-to-binary-search-tree/Solution.py → ...ed-list-to-binary-search-tree/Solution.py
diff --git a/...py-list-with-random-pointer/Solution.java → ...py-list-with-random-pointer/Solution.java b/...py-list-with-random-pointer/Solution.java → ...py-list-with-random-pointer/Solution.java
diff --git a/algorithms/count-and-say/Solution.java → questions/count-and-say/Solution.java b/algorithms/count-and-say/Solution.java → questions/count-and-say/Solution.java
diff --git a/...ithms/count-binary-substrings/Solution.py → ...tions/count-binary-substrings/Solution.py b/...ithms/count-binary-substrings/Solution.py → ...tions/count-binary-substrings/Solution.py
diff --git a/...hms/count-complete-tree-nodes/Solution.py → ...ons/count-complete-tree-nodes/Solution.py b/...hms/count-complete-tree-nodes/Solution.py → ...ons/count-complete-tree-nodes/Solution.py
diff --git a/algorithms/count-primes/Solution.py → questions/count-primes/Solution.py b/algorithms/count-primes/Solution.py → questions/count-primes/Solution.py
diff --git a/...are-submatrices-with-all-ones/Solution.py → ...are-submatrices-with-all-ones/Solution.py b/...are-submatrices-with-all-ones/Solution.py → ...are-submatrices-with-all-ones/Solution.py
diff --git a/algorithms/counting-bits/Solution.java → questions/counting-bits/Solution.java b/algorithms/counting-bits/Solution.java → questions/counting-bits/Solution.java
diff --git a/algorithms/course-schedule-ii/Solution.py → questions/course-schedule-ii/Solution.py b/algorithms/course-schedule-ii/Solution.py → questions/course-schedule-ii/Solution.py
diff --git a/algorithms/course-schedule/Solution.py → questions/course-schedule/Solution.py b/algorithms/course-schedule/Solution.py → questions/course-schedule/Solution.py
diff --git a/...es/customers-who-never-order/Solution.sql → ...ns/customers-who-never-order/Solution.sql b/...es/customers-who-never-order/Solution.sql → ...ns/customers-who-never-order/Solution.sql
diff --git a/algorithms/decode-string/Solution.py → questions/decode-string/Solution.py b/algorithms/decode-string/Solution.py → questions/decode-string/Solution.py
diff --git a/...ithms/decoded-string-at-index/Solution.py → ...tions/decoded-string-at-index/Solution.py b/...ithms/decoded-string-at-index/Solution.py → ...tions/decoded-string-at-index/Solution.py
diff --git a/algorithms/degree-of-an-array/Solution.py → questions/degree-of-an-array/Solution.py b/algorithms/degree-of-an-array/Solution.py → questions/degree-of-an-array/Solution.py
diff --git a/...ases/delete-duplicate-emails/Solution.sql → ...ions/delete-duplicate-emails/Solution.sql b/...ases/delete-duplicate-emails/Solution.sql → ...ions/delete-duplicate-emails/Solution.sql
diff --git a/...delete-node-in-a-linked-list/Solution.cpp → ...delete-node-in-a-linked-list/Solution.cpp b/...delete-node-in-a-linked-list/Solution.cpp → ...delete-node-in-a-linked-list/Solution.cpp
diff --git a/.../delete-node-in-a-linked-list/Solution.py → .../delete-node-in-a-linked-list/Solution.py b/.../delete-node-in-a-linked-list/Solution.py → .../delete-node-in-a-linked-list/Solution.py
diff --git a/...es/department-highest-salary/Solution.sql → ...ns/department-highest-salary/Solution.sql b/...es/department-highest-salary/Solution.sql → ...ns/department-highest-salary/Solution.sql
diff --git a/...epartment-top-three-salaries/Solution.sql → ...epartment-top-three-salaries/Solution.sql b/...epartment-top-three-salaries/Solution.sql → ...epartment-top-three-salaries/Solution.sql
diff --git a/algorithms/design-hashmap/Solution.py → questions/design-hashmap/Solution.py b/algorithms/design-hashmap/Solution.py → questions/design-hashmap/Solution.py
diff --git a/algorithms/design-hashset/Solution.py → questions/design-hashset/Solution.py b/algorithms/design-hashset/Solution.py → questions/design-hashset/Solution.py
diff --git a/algorithms/design-linked-list/Solution.py → questions/design-linked-list/Solution.py b/algorithms/design-linked-list/Solution.py → questions/design-linked-list/Solution.py
diff --git a/...hms/diameter-of-binary-tree/Solution.java → ...ons/diameter-of-binary-tree/Solution.java b/...hms/diameter-of-binary-tree/Solution.java → ...ons/diameter-of-binary-tree/Solution.java
diff --git a/...ithms/diameter-of-binary-tree/Solution.py → ...tions/diameter-of-binary-tree/Solution.py b/...ithms/diameter-of-binary-tree/Solution.py → ...tions/diameter-of-binary-tree/Solution.py
diff --git a/algorithms/divide-two-integers/Solution.py → questions/divide-two-integers/Solution.py b/algorithms/divide-two-integers/Solution.py → questions/divide-two-integers/Solution.py
diff --git a/databases/duplicate-emails/Solution.sql → questions/duplicate-emails/Solution.sql b/databases/duplicate-emails/Solution.sql → questions/duplicate-emails/Solution.sql
diff --git a/algorithms/edit-distance/Solution.cpp → questions/edit-distance/Solution.cpp b/algorithms/edit-distance/Solution.cpp → questions/edit-distance/Solution.cpp
diff --git a/algorithms/edit-distance/Solution.java → questions/edit-distance/Solution.java b/algorithms/edit-distance/Solution.java → questions/edit-distance/Solution.java
diff --git a/algorithms/employee-importance/Solution.py → questions/employee-importance/Solution.py b/algorithms/employee-importance/Solution.py → questions/employee-importance/Solution.py
diff --git a/...ing-more-than-their-managers/Solution.sql → ...ing-more-than-their-managers/Solution.sql b/...ing-more-than-their-managers/Solution.sql → ...ing-more-than-their-managers/Solution.sql
diff --git a/...luate-reverse-polish-notation/Solution.py → ...luate-reverse-polish-notation/Solution.py b/...luate-reverse-polish-notation/Solution.py → ...luate-reverse-polish-notation/Solution.py
diff --git a/...hms/excel-sheet-column-number/Solution.py → ...ons/excel-sheet-column-number/Solution.py b/...hms/excel-sheet-column-number/Solution.py → ...ons/excel-sheet-column-number/Solution.py
diff --git a/...thms/excel-sheet-column-title/Solution.py → ...ions/excel-sheet-column-title/Solution.py b/...thms/excel-sheet-column-title/Solution.py → ...ions/excel-sheet-column-title/Solution.py
diff --git a/databases/exchange-seats/Solution.sql → questions/exchange-seats/Solution.sql b/databases/exchange-seats/Solution.sql → questions/exchange-seats/Solution.sql
diff --git a/...hms/factorial-trailing-zeroes/Solution.py → ...ons/factorial-trailing-zeroes/Solution.py b/...hms/factorial-trailing-zeroes/Solution.py → ...ons/factorial-trailing-zeroes/Solution.py
diff --git a/algorithms/fair-candy-swap/Solution.py → questions/fair-candy-swap/Solution.py b/algorithms/fair-candy-swap/Solution.py → questions/fair-candy-swap/Solution.py
diff --git a/...nd-all-anagrams-in-a-string/Solution.java → ...nd-all-anagrams-in-a-string/Solution.java b/...nd-all-anagrams-in-a-string/Solution.java → ...nd-all-anagrams-in-a-string/Solution.java
diff --git a/...ers-disappeared-in-an-array/Solution.java → ...ers-disappeared-in-an-array/Solution.java b/...ers-disappeared-in-an-array/Solution.java → ...ers-disappeared-in-an-array/Solution.java
diff --git a/...on-of-element-in-sorted-array/Solution.py → ...on-of-element-in-sorted-array/Solution.py b/...on-of-element-in-sorted-array/Solution.py → ...on-of-element-in-sorted-array/Solution.py
diff --git a/...ind-median-from-data-stream/Solution.java → ...ind-median-from-data-stream/Solution.java b/...ind-median-from-data-stream/Solution.java → ...ind-median-from-data-stream/Solution.java
diff --git a/...nimum-in-rotated-sorted-array/Solution.py → ...nimum-in-rotated-sorted-array/Solution.py b/...nimum-in-rotated-sorted-array/Solution.py → ...nimum-in-rotated-sorted-array/Solution.py
diff --git a/algorithms/find-peak-element/Solution.java → questions/find-peak-element/Solution.java b/algorithms/find-peak-element/Solution.java → questions/find-peak-element/Solution.java
diff --git a/algorithms/find-peak-element/Solution.py → questions/find-peak-element/Solution.py b/algorithms/find-peak-element/Solution.py → questions/find-peak-element/Solution.py
diff --git a/algorithms/find-pivot-index/Solution.py → questions/find-pivot-index/Solution.py b/algorithms/find-pivot-index/Solution.py → questions/find-pivot-index/Solution.py
diff --git a/...st-letter-greater-than-target/Solution.py → ...st-letter-greater-than-target/Solution.py b/...st-letter-greater-than-target/Solution.py → ...st-letter-greater-than-target/Solution.py
diff --git a/algorithms/find-the-difference/Solution.py → questions/find-the-difference/Solution.py b/algorithms/find-the-difference/Solution.py → questions/find-the-difference/Solution.py
diff --git a/...s/find-the-duplicate-number/Solution.java → ...s/find-the-duplicate-number/Solution.java b/...s/find-the-duplicate-number/Solution.java → ...s/find-the-duplicate-number/Solution.java
diff --git a/...hms/find-the-duplicate-number/Solution.py → ...ons/find-the-duplicate-number/Solution.py b/...hms/find-the-duplicate-number/Solution.py → ...ons/find-the-duplicate-number/Solution.py
diff --git a/...rithms/first-missing-positive/Solution.py → questions/first-missing-positive/Solution.py b/...rithms/first-missing-positive/Solution.py → questions/first-missing-positive/Solution.py
diff --git a/algorithms/flipping-an-image/Solution.java → questions/flipping-an-image/Solution.java b/algorithms/flipping-an-image/Solution.java → questions/flipping-an-image/Solution.java
diff --git a/algorithms/flood-fill/Solution.py → questions/flood-fill/Solution.py b/algorithms/flood-fill/Solution.py → questions/flood-fill/Solution.py
diff --git a/...fraction-to-recurring-decimal/Solution.py → ...fraction-to-recurring-decimal/Solution.py b/...fraction-to-recurring-decimal/Solution.py → ...fraction-to-recurring-decimal/Solution.py
diff --git a/algorithms/gas-station/Solution.py → questions/gas-station/Solution.py b/algorithms/gas-station/Solution.py → questions/gas-station/Solution.py
diff --git a/...rithms/generate-parentheses/Solution.java → questions/generate-parentheses/Solution.java b/...rithms/generate-parentheses/Solution.java → questions/generate-parentheses/Solution.java
diff --git a/algorithms/goat-latin/Solution.py → questions/goat-latin/Solution.py b/algorithms/goat-latin/Solution.py → questions/goat-latin/Solution.py
diff --git a/...est-common-divisor-of-strings/Solution.py → ...est-common-divisor-of-strings/Solution.py b/...est-common-divisor-of-strings/Solution.py → ...est-common-divisor-of-strings/Solution.py
diff --git a/algorithms/group-anagrams/Solution.py → questions/group-anagrams/Solution.py b/algorithms/group-anagrams/Solution.py → questions/group-anagrams/Solution.py
diff --git a/...of-special-equivalent-strings/Solution.py → ...of-special-equivalent-strings/Solution.py b/...of-special-equivalent-strings/Solution.py → ...of-special-equivalent-strings/Solution.py
diff --git a/algorithms/h-index-2/Solution.java → questions/h-index-2/Solution.java b/algorithms/h-index-2/Solution.java → questions/h-index-2/Solution.java
diff --git a/algorithms/h-index/Solution.java → questions/h-index/Solution.java b/algorithms/h-index/Solution.java → questions/h-index/Solution.java
diff --git a/algorithms/hamming-distance/Solution.java → questions/hamming-distance/Solution.java b/algorithms/hamming-distance/Solution.java → questions/hamming-distance/Solution.java
diff --git a/algorithms/happy-number/Solution.java → questions/happy-number/Solution.java b/algorithms/happy-number/Solution.java → questions/happy-number/Solution.java
diff --git a/algorithms/house-robber-ii/Solution.py → questions/house-robber-ii/Solution.py b/algorithms/house-robber-ii/Solution.py → questions/house-robber-ii/Solution.py
diff --git a/algorithms/house-robber/Solution.java → questions/house-robber/Solution.java b/algorithms/house-robber/Solution.java → questions/house-robber/Solution.java
diff --git a/algorithms/house-robber/Solution.py → questions/house-robber/Solution.py b/algorithms/house-robber/Solution.py → questions/house-robber/Solution.py
diff --git a/...ses/human-traffic-of-stadium/Solution.sql → ...ons/human-traffic-of-stadium/Solution.sql b/...ses/human-traffic-of-stadium/Solution.sql → ...ons/human-traffic-of-stadium/Solution.sql
diff --git a/algorithms/image-smoother/Solution.py → questions/image-smoother/Solution.py b/algorithms/image-smoother/Solution.py → questions/image-smoother/Solution.py
diff --git a/.../implement-queue-using-stacks/Solution.py → .../implement-queue-using-stacks/Solution.py b/.../implement-queue-using-stacks/Solution.py → .../implement-queue-using-stacks/Solution.py
diff --git a/.../implement-stack-using-queues/Solution.py → .../implement-stack-using-queues/Solution.py b/.../implement-stack-using-queues/Solution.py → .../implement-stack-using-queues/Solution.py
diff --git a/algorithms/implement-strstr/Solution.java → questions/implement-strstr/Solution.java b/algorithms/implement-strstr/Solution.java → questions/implement-strstr/Solution.java
diff --git a/...ms/implement-trie-prefix-tree/Solution.py → ...ns/implement-trie-prefix-tree/Solution.py b/...ms/implement-trie-prefix-tree/Solution.py → ...ns/implement-trie-prefix-tree/Solution.py
diff --git a/algorithms/insert-interval/Solution.py → questions/insert-interval/Solution.py b/algorithms/insert-interval/Solution.py → questions/insert-interval/Solution.py
diff --git a/...ert-into-a-binary-search-tree/Solution.py → ...ert-into-a-binary-search-tree/Solution.py b/...ert-into-a-binary-search-tree/Solution.py → ...ert-into-a-binary-search-tree/Solution.py
diff --git a/algorithms/insertion-sort-list/Solution.py → questions/insertion-sort-list/Solution.py b/algorithms/insertion-sort-list/Solution.py → questions/insertion-sort-list/Solution.py
diff --git a/...ms/integer-to-english-words/Solution.java → ...ns/integer-to-english-words/Solution.java b/...ms/integer-to-english-words/Solution.java → ...ns/integer-to-english-words/Solution.java
diff --git a/algorithms/integer-to-roman/Solution.java → questions/integer-to-roman/Solution.java b/algorithms/integer-to-roman/Solution.java → questions/integer-to-roman/Solution.java
diff --git a/...section-of-two-linked-lists/Solution.java → ...section-of-two-linked-lists/Solution.java b/...section-of-two-linked-lists/Solution.java → ...section-of-two-linked-lists/Solution.java
diff --git a/...ersection-of-two-linked-lists/Solution.py → ...ersection-of-two-linked-lists/Solution.py b/...ersection-of-two-linked-lists/Solution.py → ...ersection-of-two-linked-lists/Solution.py
diff --git a/algorithms/invert-binary-tree/Solution.java → questions/invert-binary-tree/Solution.java b/algorithms/invert-binary-tree/Solution.java → questions/invert-binary-tree/Solution.java
diff --git a/algorithms/invert-binary-tree/Solution.py → questions/invert-binary-tree/Solution.py b/algorithms/invert-binary-tree/Solution.py → questions/invert-binary-tree/Solution.py
diff --git a/algorithms/is-subsequence/solution.java → questions/is-subsequence/Solution.java b/algorithms/is-subsequence/solution.java → questions/is-subsequence/Solution.java
diff --git a/algorithms/is-subsequence/Solution.py → questions/is-subsequence/Solution.py b/algorithms/is-subsequence/Solution.py → questions/is-subsequence/Solution.py
diff --git a/algorithms/isomorphic-strings/Solution.java → questions/isomorphic-strings/Solution.java b/algorithms/isomorphic-strings/Solution.java → questions/isomorphic-strings/Solution.java
diff --git a/algorithms/isomorphic-strings/Solution.py → questions/isomorphic-strings/Solution.py b/algorithms/isomorphic-strings/Solution.py → questions/isomorphic-strings/Solution.py
diff --git a/algorithms/jewels-and-stones/Solution.py → questions/jewels-and-stones/Solution.py b/algorithms/jewels-and-stones/Solution.py → questions/jewels-and-stones/Solution.py
diff --git a/algorithms/judge-route-circle/Solution.py → questions/judge-route-circle/Solution.py b/algorithms/judge-route-circle/Solution.py → questions/judge-route-circle/Solution.py
diff --git a/algorithms/jump-game/Solution.java → questions/jump-game/Solution.java b/algorithms/jump-game/Solution.java → questions/jump-game/Solution.java
diff --git a/...thms/k-diff-pairs-in-an-array/Solution.py → ...ions/k-diff-pairs-in-an-array/Solution.py b/...thms/k-diff-pairs-in-an-array/Solution.py → ...ions/k-diff-pairs-in-an-array/Solution.py
diff --git a/algorithms/keyboard-row/Solution.py → questions/keyboard-row/Solution.py b/algorithms/keyboard-row/Solution.py → questions/keyboard-row/Solution.py
diff --git a/...h-largest-element-in-a-stream/Solution.py → ...h-largest-element-in-a-stream/Solution.py b/...h-largest-element-in-a-stream/Solution.py → ...h-largest-element-in-a-stream/Solution.py
diff --git a/...h-largest-element-in-an-array/Solution.py → ...h-largest-element-in-an-array/Solution.py b/...h-largest-element-in-an-array/Solution.py → ...h-largest-element-in-an-array/Solution.py
diff --git a/...kth-smallest-element-in-a-bst/Solution.py → ...kth-smallest-element-in-a-bst/Solution.py b/...kth-smallest-element-in-a-bst/Solution.py → ...kth-smallest-element-in-a-bst/Solution.py
diff --git a/...mber-at-least-twice-of-others/Solution.py → ...mber-at-least-twice-of-others/Solution.py b/...mber-at-least-twice-of-others/Solution.py → ...mber-at-least-twice-of-others/Solution.py
diff --git a/algorithms/largest-number/Solution.py → questions/largest-number/Solution.py b/algorithms/largest-number/Solution.py → questions/largest-number/Solution.py
diff --git a/...argest-rectangle-in-histogram/Solution.py → ...argest-rectangle-in-histogram/Solution.py b/...argest-rectangle-in-histogram/Solution.py → ...argest-rectangle-in-histogram/Solution.py
diff --git a/algorithms/largest-triangle-area/Solution.py → questions/largest-triangle-area/Solution.py b/algorithms/largest-triangle-area/Solution.py → questions/largest-triangle-area/Solution.py
diff --git a/algorithms/last-stone-weight-ii/Solution.py → questions/last-stone-weight-ii/Solution.py b/algorithms/last-stone-weight-ii/Solution.py → questions/last-stone-weight-ii/Solution.py
diff --git a/algorithms/leaf-similar-trees/Solution.java → questions/leaf-similar-trees/Solution.java b/algorithms/leaf-similar-trees/Solution.java → questions/leaf-similar-trees/Solution.java
diff --git a/algorithms/lemonade-change/Solution.py → questions/lemonade-change/Solution.py b/algorithms/lemonade-change/Solution.py → questions/lemonade-change/Solution.py
diff --git a/algorithms/length-of-last-word/Solution.java → questions/length-of-last-word/Solution.java b/algorithms/length-of-last-word/Solution.java → questions/length-of-last-word/Solution.java
diff --git a/...ithms/letter-case-permutation/Solution.py → ...tions/letter-case-permutation/Solution.py b/...ithms/letter-case-permutation/Solution.py → ...tions/letter-case-permutation/Solution.py
diff --git a/...binations-of-a-phone-number/Solution.java → ...binations-of-a-phone-number/Solution.java b/...binations-of-a-phone-number/Solution.java → ...binations-of-a-phone-number/Solution.java
diff --git a/...rithms/linked-list-cycle-ii/Solution.java → questions/linked-list-cycle-ii/Solution.java b/...rithms/linked-list-cycle-ii/Solution.java → questions/linked-list-cycle-ii/Solution.java
diff --git a/algorithms/linked-list-cycle/Solution.java → questions/linked-list-cycle/Solution.java b/algorithms/linked-list-cycle/Solution.java → questions/linked-list-cycle/Solution.java
diff --git a/...ithms/longest-common-prefix/Solution.java → ...tions/longest-common-prefix/Solution.java b/...ithms/longest-common-prefix/Solution.java → ...tions/longest-common-prefix/Solution.java
diff --git a/...ms/longest-common-subsequence/Solution.py → ...ns/longest-common-subsequence/Solution.py b/...ms/longest-common-subsequence/Solution.py → ...ns/longest-common-subsequence/Solution.py
diff --git a/...inuous-increasing-subsequence/Solution.py → ...inuous-increasing-subsequence/Solution.py b/...inuous-increasing-subsequence/Solution.py → ...inuous-increasing-subsequence/Solution.py
diff --git a/...s/longest-duplicate-substring/Solution.py → ...s/longest-duplicate-substring/Solution.py b/...s/longest-duplicate-substring/Solution.py → ...s/longest-duplicate-substring/Solution.py
diff --git a/...gest-increasing-subsequence/Solution.java → ...gest-increasing-subsequence/Solution.java b/...gest-increasing-subsequence/Solution.java → ...gest-increasing-subsequence/Solution.java
diff --git a/...ithout-repeating-characters/Solution.java → ...ithout-repeating-characters/Solution.java b/...ithout-repeating-characters/Solution.java → ...ithout-repeating-characters/Solution.java
diff --git a/...-without-repeating-characters/Solution.py → ...-without-repeating-characters/Solution.py b/...-without-repeating-characters/Solution.py → ...-without-repeating-characters/Solution.py
diff --git a/algorithms/longest-univalue-path/Solution.py → questions/longest-univalue-path/Solution.py b/algorithms/longest-univalue-path/Solution.py → questions/longest-univalue-path/Solution.py
diff --git a/...hms/longest-valid-parentheses/Solution.py → ...ons/longest-valid-parentheses/Solution.py b/...hms/longest-valid-parentheses/Solution.py → ...ons/longest-valid-parentheses/Solution.py
diff --git a/...ms/longest-word-in-dictionary/Solution.py → ...ns/longest-word-in-dictionary/Solution.py b/...ms/longest-word-in-dictionary/Solution.py → ...ns/longest-word-in-dictionary/Solution.py
diff --git a/...tor-of-a-binary-search-tree/Solution.java → ...tor-of-a-binary-search-tree/Solution.java b/...tor-of-a-binary-search-tree/Solution.java → ...tor-of-a-binary-search-tree/Solution.java
diff --git a/...estor-of-a-binary-search-tree/Solution.py → ...estor-of-a-binary-search-tree/Solution.py b/...estor-of-a-binary-search-tree/Solution.py → ...estor-of-a-binary-search-tree/Solution.py
diff --git a/...mon-ancestor-of-a-binary-tree/Solution.py → ...mon-ancestor-of-a-binary-tree/Solution.py b/...mon-ancestor-of-a-binary-tree/Solution.py → ...mon-ancestor-of-a-binary-tree/Solution.py
diff --git a/algorithms/lru-cache/Solution.py → questions/lru-cache/Solution.py b/algorithms/lru-cache/Solution.py → questions/lru-cache/Solution.py
diff --git a/algorithms/magic-squares-in-grid/Solution.py → questions/magic-squares-in-grid/Solution.py b/algorithms/magic-squares-in-grid/Solution.py → questions/magic-squares-in-grid/Solution.py
diff --git a/algorithms/majority-element-ii/Solution.java → questions/majority-element-ii/Solution.java b/algorithms/majority-element-ii/Solution.java → questions/majority-element-ii/Solution.java
diff --git a/algorithms/majority-element-ii/Solution.py → questions/majority-element-ii/Solution.py b/algorithms/majority-element-ii/Solution.py → questions/majority-element-ii/Solution.py
diff --git a/algorithms/majority-element/Solution.java → questions/majority-element/Solution.java b/algorithms/majority-element/Solution.java → questions/majority-element/Solution.java
diff --git a/algorithms/majority-element/Solution.py → questions/majority-element/Solution.py b/algorithms/majority-element/Solution.py → questions/majority-element/Solution.py
diff --git a/algorithms/max-area-of-island/Solution.py → questions/max-area-of-island/Solution.py b/algorithms/max-area-of-island/Solution.py → questions/max-area-of-island/Solution.py
diff --git a/...rithms/max-consecutive-ones/Solution.java → questions/max-consecutive-ones/Solution.java b/...rithms/max-consecutive-ones/Solution.java → questions/max-consecutive-ones/Solution.java
diff --git a/...rithms/max-points-on-a-line/Solution.java → questions/max-points-on-a-line/Solution.java b/...rithms/max-points-on-a-line/Solution.java → questions/max-points-on-a-line/Solution.java
diff --git a/algorithms/maximal-rectangle/Solution.py → questions/maximal-rectangle/Solution.py b/algorithms/maximal-rectangle/Solution.py → questions/maximal-rectangle/Solution.py
diff --git a/algorithms/maximal-square/Solution.py → questions/maximal-square/Solution.py b/algorithms/maximal-square/Solution.py → questions/maximal-square/Solution.py
diff --git a/...ze-distance-to-closest-person/Solution.py → ...ze-distance-to-closest-person/Solution.py b/...ze-distance-to-closest-person/Solution.py → ...ze-distance-to-closest-person/Solution.py
diff --git a/...ms/maximum-average-subarray-i/Solution.py → ...ns/maximum-average-subarray-i/Solution.py b/...ms/maximum-average-subarray-i/Solution.py → ...ns/maximum-average-subarray-i/Solution.py
diff --git a/...aximum-depth-of-binary-tree/Solution.java → ...aximum-depth-of-binary-tree/Solution.java b/...aximum-depth-of-binary-tree/Solution.java → ...aximum-depth-of-binary-tree/Solution.java
diff --git a/.../maximum-depth-of-binary-tree/Solution.py → .../maximum-depth-of-binary-tree/Solution.py b/.../maximum-depth-of-binary-tree/Solution.py → .../maximum-depth-of-binary-tree/Solution.py
diff --git a/...thms/maximum-product-subarray/Solution.py → ...ions/maximum-product-subarray/Solution.py b/...thms/maximum-product-subarray/Solution.py → ...ions/maximum-product-subarray/Solution.py
diff --git a/algorithms/maximum-subarray/Solution.java → questions/maximum-subarray/Solution.java b/algorithms/maximum-subarray/Solution.java → questions/maximum-subarray/Solution.java
diff --git a/algorithms/maximum-subarray/Solution.py → questions/maximum-subarray/Solution.py b/algorithms/maximum-subarray/Solution.py → questions/maximum-subarray/Solution.py
diff --git a/algorithms/maximum-swap/Solution.py → questions/maximum-swap/Solution.py b/algorithms/maximum-swap/Solution.py → questions/maximum-swap/Solution.py
diff --git a/algorithms/merge-intervals/Solution.py → questions/merge-intervals/Solution.py b/algorithms/merge-intervals/Solution.py → questions/merge-intervals/Solution.py
diff --git a/algorithms/merge-k-sorted-lists/Solution.py → questions/merge-k-sorted-lists/Solution.py b/algorithms/merge-k-sorted-lists/Solution.py → questions/merge-k-sorted-lists/Solution.py
diff --git a/algorithms/merge-sorted-array/Solution.java → questions/merge-sorted-array/Solution.java b/algorithms/merge-sorted-array/Solution.java → questions/merge-sorted-array/Solution.java
diff --git a/...thms/merge-two-binary-trees/Solution.java → ...ions/merge-two-binary-trees/Solution.java b/...thms/merge-two-binary-trees/Solution.java → ...ions/merge-two-binary-trees/Solution.java
diff --git a/...thms/merge-two-sorted-lists/Solution.java → ...ions/merge-two-sorted-lists/Solution.java b/...thms/merge-two-sorted-lists/Solution.java → ...ions/merge-two-sorted-lists/Solution.java
diff --git a/...rithms/merge-two-sorted-lists/Solution.py → questions/merge-two-sorted-lists/Solution.py b/...rithms/merge-two-sorted-lists/Solution.py → questions/merge-two-sorted-lists/Solution.py
diff --git a/...hms/middle-of-the-linked-list/Solution.py → ...ons/middle-of-the-linked-list/Solution.py b/...hms/middle-of-the-linked-list/Solution.py → ...ons/middle-of-the-linked-list/Solution.py
diff --git a/...thms/min-cost-climbing-stairs/Solution.py → ...ions/min-cost-climbing-stairs/Solution.py b/...thms/min-cost-climbing-stairs/Solution.py → ...ions/min-cost-climbing-stairs/Solution.py
diff --git a/algorithms/min-stack/Solution.java → questions/min-stack/Solution.java b/algorithms/min-stack/Solution.java → questions/min-stack/Solution.java
diff --git a/algorithms/min-stack/Solution.py → questions/min-stack/Solution.py b/algorithms/min-stack/Solution.py → questions/min-stack/Solution.py
diff --git a/...inimum-depth-of-binary-tree/Solution.java → ...inimum-depth-of-binary-tree/Solution.java b/...inimum-depth-of-binary-tree/Solution.java → ...inimum-depth-of-binary-tree/Solution.java
diff --git a/...r-of-arrows-to-burst-balloons/Solution.py → ...r-of-arrows-to-burst-balloons/Solution.py b/...r-of-arrows-to-burst-balloons/Solution.py → ...r-of-arrows-to-burst-balloons/Solution.py
diff --git a/algorithms/minimum-path-sum/Solution.py → questions/minimum-path-sum/Solution.py b/algorithms/minimum-path-sum/Solution.py → questions/minimum-path-sum/Solution.py
diff --git a/...hms/minimum-size-subarray-sum/Solution.py → ...ons/minimum-size-subarray-sum/Solution.py b/...hms/minimum-size-subarray-sum/Solution.py → ...ons/minimum-size-subarray-sum/Solution.py
diff --git a/...thms/minimum-window-substring/Solution.py → ...ions/minimum-window-substring/Solution.py b/...thms/minimum-window-substring/Solution.py → ...ions/minimum-window-substring/Solution.py
diff --git a/algorithms/missing-number/Solution.java → questions/missing-number/Solution.java b/algorithms/missing-number/Solution.java → questions/missing-number/Solution.java
diff --git a/algorithms/most-common-word/Solution.py → questions/most-common-word/Solution.py b/algorithms/most-common-word/Solution.py → questions/most-common-word/Solution.py
diff --git a/algorithms/move-zeroes/Solution.cpp → questions/move-zeroes/Solution.cpp b/algorithms/move-zeroes/Solution.cpp → questions/move-zeroes/Solution.cpp
diff --git a/algorithms/multiply-strings/Solution.java → questions/multiply-strings/Solution.java b/algorithms/multiply-strings/Solution.java → questions/multiply-strings/Solution.java
diff --git a/...rithms/next-greater-element-i/Solution.py → questions/next-greater-element-i/Solution.py b/...rithms/next-greater-element-i/Solution.py → questions/next-greater-element-i/Solution.py
diff --git a/...hms/next-greater-element-ii/Solution.java → ...ons/next-greater-element-ii/Solution.java b/...hms/next-greater-element-ii/Solution.java → ...ons/next-greater-element-ii/Solution.java
diff --git a/algorithms/next-permutation/Solution.py → questions/next-permutation/Solution.py b/algorithms/next-permutation/Solution.py → questions/next-permutation/Solution.py
diff --git a/algorithms/nim-game/Solution.cpp → questions/nim-game/Solution.cpp b/algorithms/nim-game/Solution.cpp → questions/nim-game/Solution.cpp
diff --git a/algorithms/nim-game/Solution.java → questions/nim-game/Solution.java b/algorithms/nim-game/Solution.java → questions/nim-game/Solution.java
diff --git a/algorithms/non-decreasing-array/Solution.py → questions/non-decreasing-array/Solution.py b/algorithms/non-decreasing-array/Solution.py → questions/non-decreasing-array/Solution.py
diff --git a/databases/not-boring-movies/Solution.sql → questions/not-boring-movies/Solution.sql b/databases/not-boring-movies/Solution.sql → questions/not-boring-movies/Solution.sql
diff --git a/databases/nth-highest-salary/Solution.sql → questions/nth-highest-salary/Solution.sql b/databases/nth-highest-salary/Solution.sql → questions/nth-highest-salary/Solution.sql
diff --git a/algorithms/number-of-1-bits/Solution.java → questions/number-of-1-bits/Solution.java b/algorithms/number-of-1-bits/Solution.java → questions/number-of-1-bits/Solution.java
diff --git a/algorithms/number-of-1-bits/Solution.py → questions/number-of-1-bits/Solution.py b/algorithms/number-of-1-bits/Solution.py → questions/number-of-1-bits/Solution.py
diff --git a/algorithms/number-of-digit-one/Solution.cpp → questions/number-of-digit-one/Solution.cpp b/algorithms/number-of-digit-one/Solution.cpp → questions/number-of-digit-one/Solution.cpp
diff --git a/algorithms/number-of-digit-one/Solution.py → questions/number-of-digit-one/Solution.py b/algorithms/number-of-digit-one/Solution.py → questions/number-of-digit-one/Solution.py
diff --git a/algorithms/number-of-islands/Solution.py → questions/number-of-islands/Solution.py b/algorithms/number-of-islands/Solution.py → questions/number-of-islands/Solution.py
diff --git a/...mber-of-lines-to-write-string/Solution.py → ...mber-of-lines-to-write-string/Solution.py b/...mber-of-lines-to-write-string/Solution.py → ...mber-of-lines-to-write-string/Solution.py
diff --git a/...rithms/number-of-recent-calls/Solution.py → questions/number-of-recent-calls/Solution.py b/...rithms/number-of-recent-calls/Solution.py → questions/number-of-recent-calls/Solution.py
diff --git a/...rithms/odd-even-linked-list/Solution.java → questions/odd-even-linked-list/Solution.java b/...rithms/odd-even-linked-list/Solution.java → questions/odd-even-linked-list/Solution.java
diff --git a/...thms/palindrome-linked-list/Solution.java → ...ions/palindrome-linked-list/Solution.java b/...thms/palindrome-linked-list/Solution.java → ...ions/palindrome-linked-list/Solution.java
diff --git a/...rithms/palindrome-linked-list/Solution.py → questions/palindrome-linked-list/Solution.py b/...rithms/palindrome-linked-list/Solution.py → questions/palindrome-linked-list/Solution.py
diff --git a/algorithms/palindrome-number/Solution.java → questions/palindrome-number/Solution.java b/algorithms/palindrome-number/Solution.java → questions/palindrome-number/Solution.java
diff --git a/...ithms/palindrome-partitioning/Solution.py → ...tions/palindrome-partitioning/Solution.py b/...ithms/palindrome-partitioning/Solution.py → ...tions/palindrome-partitioning/Solution.py
diff --git a/algorithms/partition-list/Solution.py → questions/partition-list/Solution.py b/algorithms/partition-list/Solution.py → questions/partition-list/Solution.py
diff --git a/algorithms/pascals-triangle-ii/Solution.java → questions/pascals-triangle-ii/Solution.java b/algorithms/pascals-triangle-ii/Solution.java → questions/pascals-triangle-ii/Solution.java
diff --git a/algorithms/pascals-triangle/Solution.java → questions/pascals-triangle/Solution.java b/algorithms/pascals-triangle/Solution.java → questions/pascals-triangle/Solution.java
diff --git a/algorithms/patching-array/Solution.java → questions/patching-array/Solution.java b/algorithms/patching-array/Solution.java → questions/patching-array/Solution.java
diff --git a/algorithms/path-sum-ii/Solution.java → questions/path-sum-ii/Solution.java b/algorithms/path-sum-ii/Solution.java → questions/path-sum-ii/Solution.java
diff --git a/algorithms/path-sum-ii/Solution.py → questions/path-sum-ii/Solution.py b/algorithms/path-sum-ii/Solution.py → questions/path-sum-ii/Solution.py
diff --git a/algorithms/path-sum-iii/Solution.java → questions/path-sum-iii/Solution.java b/algorithms/path-sum-iii/Solution.java → questions/path-sum-iii/Solution.java
diff --git a/algorithms/path-sum/Solution.java → questions/path-sum/Solution.java b/algorithms/path-sum/Solution.java → questions/path-sum/Solution.java
diff --git a/algorithms/path-sum/Solution.py → questions/path-sum/Solution.py b/algorithms/path-sum/Solution.py → questions/path-sum/Solution.py
diff --git a/...eak-index-in-a-mountain-array/Solution.py → ...eak-index-in-a-mountain-array/Solution.py b/...eak-index-in-a-mountain-array/Solution.py → ...eak-index-in-a-mountain-array/Solution.py
diff --git a/algorithms/peeking-iterator/Solution.java → questions/peeking-iterator/Solution.java b/algorithms/peeking-iterator/Solution.java → questions/peeking-iterator/Solution.java
diff --git a/algorithms/perfect-squares/Solution.java → questions/perfect-squares/Solution.java b/algorithms/perfect-squares/Solution.java → questions/perfect-squares/Solution.java
diff --git a/algorithms/permutation-sequence/Solution.py → questions/permutation-sequence/Solution.py b/algorithms/permutation-sequence/Solution.py → questions/permutation-sequence/Solution.py
diff --git a/algorithms/permutations-ii/Solution.py → questions/permutations-ii/Solution.py b/algorithms/permutations-ii/Solution.py → questions/permutations-ii/Solution.py
diff --git a/algorithms/permutations/Solution.java → questions/permutations/Solution.java b/algorithms/permutations/Solution.java → questions/permutations/Solution.java
diff --git a/algorithms/permutations/Solution.py → questions/permutations/Solution.py b/algorithms/permutations/Solution.py → questions/permutations/Solution.py
diff --git a/algorithms/plus-one/Solution.java → questions/plus-one/Solution.java b/algorithms/plus-one/Solution.java → questions/plus-one/Solution.java
diff --git a/...hms/positions-of-large-groups/Solution.py → ...ons/positions-of-large-groups/Solution.py b/...hms/positions-of-large-groups/Solution.py → ...ons/positions-of-large-groups/Solution.py
diff --git a/algorithms/pow(x,n)/Solution.java → questions/pow(x,n)/Solution.java b/algorithms/pow(x,n)/Solution.java → questions/pow(x,n)/Solution.java
diff --git a/algorithms/power-of-two/Solution.py → questions/power-of-two/Solution.py b/algorithms/power-of-two/Solution.py → questions/power-of-two/Solution.py
diff --git a/...bits-in-binary-representation/Solution.py → ...bits-in-binary-representation/Solution.py b/...bits-in-binary-representation/Solution.py → ...bits-in-binary-representation/Solution.py
diff --git a/.../product-of-array-except-self/Solution.py → .../product-of-array-except-self/Solution.py b/.../product-of-array-except-self/Solution.py → .../product-of-array-except-self/Solution.py
diff --git a/...rojection-area-of-3d-shapes/Solution.java → ...rojection-area-of-3d-shapes/Solution.java b/...rojection-area-of-3d-shapes/Solution.java → ...rojection-area-of-3d-shapes/Solution.java
diff --git a/...ange-sum-query-2d-immutable/Solution.java → ...ange-sum-query-2d-immutable/Solution.java b/...ange-sum-query-2d-immutable/Solution.java → ...ange-sum-query-2d-immutable/Solution.java
diff --git a/...s/range-sum-query-immutable/Solution.java → ...s/range-sum-query-immutable/Solution.java b/...s/range-sum-query-immutable/Solution.java → ...s/range-sum-query-immutable/Solution.java
diff --git a/databases/rank-scores/Solution.sql → questions/rank-scores/Solution.sql b/databases/rank-scores/Solution.sql → questions/rank-scores/Solution.sql
diff --git a/algorithms/rectangle-overlap/Solution.py → questions/rectangle-overlap/Solution.py b/algorithms/rectangle-overlap/Solution.py → questions/rectangle-overlap/Solution.py
diff --git a/...thms/remove-covered-intervals/Solution.py → ...ions/remove-covered-intervals/Solution.py b/...thms/remove-covered-intervals/Solution.py → ...ions/remove-covered-intervals/Solution.py
diff --git a/...thms/remove-duplicate-letters/Solution.py → ...ions/remove-duplicate-letters/Solution.py b/...thms/remove-duplicate-letters/Solution.py → ...ions/remove-duplicate-letters/Solution.py
diff --git a/...icates-from-sorted-array-ii/Solution.java → ...icates-from-sorted-array-ii/Solution.java b/...icates-from-sorted-array-ii/Solution.java → ...icates-from-sorted-array-ii/Solution.java
diff --git a/...uplicates-from-sorted-array/Solution.java → ...uplicates-from-sorted-array/Solution.java b/...uplicates-from-sorted-array/Solution.java → ...uplicates-from-sorted-array/Solution.java
diff --git a/...plicates-from-sorted-list-ii/Solution.cpp → ...plicates-from-sorted-list-ii/Solution.cpp b/...plicates-from-sorted-list-ii/Solution.cpp → ...plicates-from-sorted-list-ii/Solution.cpp
diff --git a/...licates-from-sorted-list-ii/Solution.java → ...licates-from-sorted-list-ii/Solution.java b/...licates-from-sorted-list-ii/Solution.java → ...licates-from-sorted-list-ii/Solution.java
diff --git a/...uplicates-from-sorted-list-ii/Solution.py → ...uplicates-from-sorted-list-ii/Solution.py b/...uplicates-from-sorted-list-ii/Solution.py → ...uplicates-from-sorted-list-ii/Solution.py
diff --git a/...duplicates-from-sorted-list/Solution.java → ...duplicates-from-sorted-list/Solution.java b/...duplicates-from-sorted-list/Solution.java → ...duplicates-from-sorted-list/Solution.java
diff --git a/...e-duplicates-from-sorted-list/Solution.py → ...e-duplicates-from-sorted-list/Solution.py b/...e-duplicates-from-sorted-list/Solution.py → ...e-duplicates-from-sorted-list/Solution.py
diff --git a/algorithms/remove-element/Solution.java → questions/remove-element/Solution.java b/algorithms/remove-element/Solution.java → questions/remove-element/Solution.java
diff --git a/...remove-linked-list-elements/Solution.java → ...remove-linked-list-elements/Solution.java b/...remove-linked-list-elements/Solution.java → ...remove-linked-list-elements/Solution.java
diff --git a/...s/remove-linked-list-elements/Solution.py → ...s/remove-linked-list-elements/Solution.py b/...s/remove-linked-list-elements/Solution.py → ...s/remove-linked-list-elements/Solution.py
diff --git a/...e-nth-node-from-end-of-list/Solution.java → ...e-nth-node-from-end-of-list/Solution.java b/...e-nth-node-from-end-of-list/Solution.java → ...e-nth-node-from-end-of-list/Solution.java
diff --git a/...thms/repeated-dna-sequences/Solution.java → ...ions/repeated-dna-sequences/Solution.java b/...thms/repeated-dna-sequences/Solution.java → ...ions/repeated-dna-sequences/Solution.java
diff --git a/...rithms/repeated-dna-sequences/Solution.py → questions/repeated-dna-sequences/Solution.py b/...rithms/repeated-dna-sequences/Solution.py → questions/repeated-dna-sequences/Solution.py
diff --git a/algorithms/repeated-string-match/Solution.py → questions/repeated-string-match/Solution.py b/algorithms/repeated-string-match/Solution.py → questions/repeated-string-match/Solution.py
diff --git a/algorithms/reverse-bits/Solution.java → questions/reverse-bits/Solution.java b/algorithms/reverse-bits/Solution.java → questions/reverse-bits/Solution.java
diff --git a/algorithms/reverse-bits/Solution.py → questions/reverse-bits/Solution.py b/algorithms/reverse-bits/Solution.py → questions/reverse-bits/Solution.py
diff --git a/algorithms/reverse-integer/Solution.java → questions/reverse-integer/Solution.java b/algorithms/reverse-integer/Solution.java → questions/reverse-integer/Solution.java
diff --git a/...thms/reverse-linked-list-ii/Solution.java → ...ions/reverse-linked-list-ii/Solution.java b/...thms/reverse-linked-list-ii/Solution.java → ...ions/reverse-linked-list-ii/Solution.java
diff --git a/algorithms/reverse-linked-list/Solution.java → questions/reverse-linked-list/Solution.java b/algorithms/reverse-linked-list/Solution.java → questions/reverse-linked-list/Solution.java
diff --git a/algorithms/reverse-linked-list/Solution.py → questions/reverse-linked-list/Solution.py b/algorithms/reverse-linked-list/Solution.py → questions/reverse-linked-list/Solution.py
diff --git a/...thms/reverse-nodes-in-k-group/Solution.py → ...ions/reverse-nodes-in-k-group/Solution.py b/...thms/reverse-nodes-in-k-group/Solution.py → ...ions/reverse-nodes-in-k-group/Solution.py
diff --git a/algorithms/reverse-string/Solution.java → questions/reverse-string/Solution.java b/algorithms/reverse-string/Solution.java → questions/reverse-string/Solution.java
diff --git a/...hms/reverse-words-in-a-string/Solution.py → ...ons/reverse-words-in-a-string/Solution.py b/...hms/reverse-words-in-a-string/Solution.py → ...ons/reverse-words-in-a-string/Solution.py
diff --git a/databases/rising-temperature/Solution.sql → questions/rising-temperature/Solution.sql b/databases/rising-temperature/Solution.sql → questions/rising-temperature/Solution.sql
diff --git a/algorithms/roman-to-integer/Solution.java → questions/roman-to-integer/Solution.java b/algorithms/roman-to-integer/Solution.java → questions/roman-to-integer/Solution.java
diff --git a/algorithms/rotate-array/Solution.java → questions/rotate-array/Solution.java b/algorithms/rotate-array/Solution.java → questions/rotate-array/Solution.java
diff --git a/algorithms/rotate-array/Solution.py → questions/rotate-array/Solution.py b/algorithms/rotate-array/Solution.py → questions/rotate-array/Solution.py
diff --git a/algorithms/rotate-image/Solution.py → questions/rotate-image/Solution.py b/algorithms/rotate-image/Solution.py → questions/rotate-image/Solution.py
diff --git a/algorithms/rotate-list/Solution.java → questions/rotate-list/Solution.java b/algorithms/rotate-list/Solution.java → questions/rotate-list/Solution.java
diff --git a/algorithms/rotate-list/Solution.py → questions/rotate-list/Solution.py b/algorithms/rotate-list/Solution.py → questions/rotate-list/Solution.py