//url:https://leetcode.com/problems/toeplitz-matrix/description/
class Solution {
public:
    bool isToeplitzMatrix(vector>& matrix) {
        //左下部分验证
        for(int i=0;i=matrix.size())
                    break;
                cout<<"1:x="<=matrix[0].size())
                    break;
                cout<<"2:x="<