73

set-matrix-zeroes/jeldo.py

@@ -0,0 +1,19 @@
+class Solution:
+    # Time: O(m*n), m = len(matrix), len(matrix[0])
+    # Space: O(m+n)
+    def setZeroes(self, matrix: list[list[int]]) -> None:
+        """
+        Do not return anything, modify matrix in-place instead.
+        """
+        row_zeros, col_zeros = set(), set()
+        for i in range(len(matrix)):
+            for j in range(len(matrix[0])):
+                if matrix[i][j] == 0:
+                    row_zeros.add(i)
+                    col_zeros.add(j)
+        for r in row_zeros:
+            for j in range(len(matrix[0])):
+                matrix[r][j] = 0
+        for c in col_zeros:
+            for i in range(len(matrix)):
+                matrix[i][c] = 0