Java for LeetCode 073 Set Matrix Zeroes

標籤：

Given a m x n matrix, if an element is 0, set its entire row and column to 0. Do it in place.

解題思路：

用兩個boolean數組row col表示行列是否有零即可，JAVA實現如下：

public void setZeroes(int[][] matrix) {if (matrix.length == 0 || matrix[0].length == 0)return;boolean[] row = new boolean[matrix.length], col = new boolean[matrix[0].length];for (int i = 0; i < matrix.length; i++)for (int j = 0; j < matrix[0].length; j++)if (matrix[i][j] == 0) {row[i] = true;col[j] = true;}for (int i = 0; i < matrix.length; i++)for (int j = 0; j < matrix[i].length; j++)if (row[i] || col[j])matrix[i][j] = 0;}

 

Java for LeetCode 073 Set Matrix Zeroes