C++/代码：

C++/代码：

class Solution {
public:
    bool Find(int target, vector<vector<int> > array) {
        if (array.empty() || array[0].empty()) return false;
        int i = 0, j = array[0].size() - 1;
        while (i < array.size() && j >= 0) {
            if (array[i][j] == target) {
                return true;
                break;
            }
            else if (array[i][j] < target) i++;
            else j--;
        }
        return false;
    }
};