set matrix zeroes solution

Author: devyejin

set-matrix-zeroes/devyejin.py

@@ -0,0 +1,20 @@
+from typing import List
+class Solution:
+    def setZeroes(self, matrix: List[List[int]]) -> None:
+        """
+        Do not return anything, modify matrix in-place instead.
+        """
+        n, m = len(matrix), len(matrix[0])
+        rows, cols = set(), set()
+
+        for r in range(n):
+            for c in range(m):
+                if matrix[r][c] == 0:
+                    rows.add(r)
+                    cols.add(c)
+
+        for r in range(n):
+            for c in range(m):
+                if r in rows or c in cols:
+                    matrix[r][c] = 0
+