二维数组中的查找

class Solution {
public:
  bool Find(vector<vector<int> > array,int target) {
    int rows = array.size();
      if(rows == 0) return false;
      int cols = array[0].size();
      int row = 0;
      int col = cols - 1;
      while(col >= 0 && row <= rows - 1)
      {
          if(array[row][col] == target)
          {
              return true;
          }
          else if(array[row][col] > target)
          {
              --col;
          }
          else
          {
              ++row;
          }
      }
    return false;
  }
};