AC_jie的博客

public boolean findNumberIn2DArray(int[][] matrix, int target) { if(matrix.length == 0) return false; int x = matrix[0].length - 1; int y = 0; boolean flag = false; while(check(x,y,matrix)){ if(matrix[y][x] > target){

class Solution { public String replaceSpace(String s) { char[] c = s.toCharArray(); char[] ans = new char[30010]; int k = 0; for(int i = 0;i < c.length;i++){ if(c[i] == 32){ ans[k++] = '%';