Toeplitz Matrix

<-E 766> Toeplitz Matrix

class Solution {
public:
    bool isToeplitzMatrix(vector<vector<int>>& matrix) {
        for(int i = 1; i < matrix.size(); i++)
            for(int j = 1; j < matrix[1].size(); j++)
                if(matrix[i][j] != matrix[i-1][j-1])
                    return false;
        return true;
    }
};