Create 0073M. Set Matrix Zeroes.py

Author: frostforestcdjl

0073M. Set Matrix Zeroes.py

@@ -0,0 +1,20 @@
+#Runtime: 112 ms, faster than 99.88% of Python3 online submissions for Set Matrix Zeroes.
+#Memory Usage: 15 MB, less than 91.08% of Python3 online submissions for Set Matrix Zeroes.
+
+class Solution:
+    def setZeroes(self, matrix: List[List[int]]) -> None:
+        """
+        Do not return anything, modify matrix in-place instead.
+        """
+        index_i = set()
+        index_j = set()
+        for i in range(len(matrix)):
+            for j in range(len(matrix[0])):
+                if matrix[i][j] == 0:
+                    index_i.add(i)
+                    index_j.add(j)
+        for i in range(len(matrix)):
+            for j in range(len(matrix[0])):
+                if i in index_i or j in index_j:
+                    matrix[i][j] = 0
+        return matrix