剑指offer---二维数组中的查找

class Solution
{
public:
    bool Find(int target, vector<vector<int> > array) 
    {
        int HangShu = array[0].size();
        int LieShu = array.size();
        int i = 0;
        int j = (LieShu - 1);
        int flag = 0;

        while ((i < HangShu) && (j >= 0))
        {
            if (array[i][j] < target)
            {
                ++i;
            }
            else if (array[i][j]>target)
            {
                --j;
            }
            else
            {
                flag = 1;
            
                break;
            }
        }
        if (flag == 0)    return false;
        else return true;
    }
};