public class Solution { public boolean Find(int target, int [][] array) { if(array==null||array.length==0){ return false; } int i=array.length-1; int j =0; while(i>=0&&j<array[0].length){ if(target==array[i][j]){ return true; } else if(target<array[i][j]){ i--; } else{ j++; } } return false; } }