diff --git a/week05-dp/leGit-y/.gitkeep b/week05-dp/leGit-y/.gitkeep
deleted file mode 100644
index e69de29..0000000
diff --git a/week05-dp/leGit-y/1912.py b/week05-dp/leGit-y/1912.py
new file mode 100644
index 0000000..a0855c4
--- /dev/null
+++ b/week05-dp/leGit-y/1912.py
@@ -0,0 +1,12 @@
+import sys
+input = sys.stdin.readline
+n = int(input())
+arr = list(map(int, input().split()))
+
+
+for i in range(1, n):
+    arr[i] = max(arr[i], arr[i] + arr[i-1])
+
+print(max(arr))
+
+
diff --git a/week05-dp/leGit-y/9251.py b/week05-dp/leGit-y/9251.py
new file mode 100644
index 0000000..8585f5f
--- /dev/null
+++ b/week05-dp/leGit-y/9251.py
@@ -0,0 +1,18 @@
+A = input()
+B = input()
+
+N1 = len(A)
+N2 = len(B)
+
+result = [[0] * (N2+1) for _ in range(N1+1)]
+
+for i in range(1, N1+1):
+    for j in range(1, N2+1):
+
+        if A[i-1] == B[j-1]:
+            result[i][j] = result[i-1][j-1] + 1
+
+        else:
+            result[i][j] = max(result[i-1][j], result[i][j-1])
+
+print(result[N1][N2])