Code:
js
/**
* @param {number[][]} matrix
* @return {void} Do not return anything, modify matrix in-place instead.
*/
var setZeroes = function(matrix) {
const row = {}
const column = {}
for (let i = 0; i < matrix.length; i++) {
for (let j = 0; j < matrix[i].length; j++) {
if (matrix[i][j] === 0) {
row[i] = true
column[j] = true
}
}
}
for (let i = 0; i < matrix.length; i++) {
for (let j = 0; j < matrix[i].length; j++) {
if (row[i] || column[j]) {
matrix[i][j] = 0
}
}
}
return matrix
};
// 时间复杂度:O(m * n)
// 空间复杂度:O(m + n)
console.log(setZeroes([[0,1,2,0],[3,4,5,2],[1,3,1,5]]))
console.log(setZeroes([[1,1,1],[1,0,1],[1,1,1]]))