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Author: assassint2017

Set Matrix Zeroes/Set_Matrix_Zeroes.py

@@ -0,0 +1,31 @@
+# 128ms 31.39%
+class Solution:
+    def setZeroes(self, matrix):
+        """
+        :type matrix: List[List[int]]
+        :rtype: void Do not return anything, modify matrix in-place instead.
+        """
+        m, n = len(matrix), len(matrix[0])
+        if m is 0 or n is 0:
+            return
+
+        first_row_zero = True if 0 in matrix[0] else False
+        first_column_zero = True if 0 in [row[0] for row in matrix] else False
+
+        for i in range(1, m):
+            for j in range(1, n):
+                if matrix[i][j] is 0:
+                    matrix[0][j] = matrix[i][0] = 0
+
+        for i in range(1, m):
+            for j in range(1, n):
+                if matrix[0][j] is 0 or matrix[i][0] is 0:
+                    matrix[i][j] = 0
+
+        if first_row_zero is True:
+            for j in range(n):
+                matrix[0][j] = 0
+
+        if first_column_zero is True:
+            for i in range(m):
+                matrix[i][0] = 0