class Solution {

 public:

     bool Find(vector<vector<int> > array,int target) {

         int rows = array.size();

         int cols = array[].size();

         int x = cols - ;

         int y = ;

         while ( x >=  && y < rows ) {

             if (array[x][y] == target) return true;

             if (array[x][y] < target) y++;

             if (array[x][y] > target) x--;

         }

         return false;

     }

 };