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;
}
} 
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