class Solution { public: bool isToeplitzMatrix(vector<vector<int>>& matrix) { int m = matrix.size(), n = matrix[0].size(); for (int i = 1; i < m; i++) { for (int j = 1; j < n; j++) { if (matrix[i][j] != matrix[i - 1][j - 1]) { return false; } } } return true; } };
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