yanrui92的专栏

Given an unsorted integer array, find the first missing positive integer.For example,Given [1,2,0] return 3,and [3,4,-1,1] return 2.Your algorithm should run in O(n) time and uses constant

Given a m x n matrix, if an element is 0, set its entire row and column to 0. Do it in place.public class Solution { public void setZeroes(int[][] matrix) { int[] row=new int[matrix.le