Toeplitz Matrix Problem & Solution
Given an m x n matrix, return true if the matrix is Toeplitz.
Otherwise, return false.
A matrix is Toeplitz if every diagonal from top-left to bottom-right has the same elements.
See the Toeplitz matrix problem on LeetCode.
C++ Solution
#pragma GCC optimize("Ofast")
#pragma GCC optimization("unroll-loops")
static const int _=[](){ios::sync_with_stdio(false);cin.tie(nullptr);cout.tie(nullptr);return 0;}();
class Solution {
public:
bool isToeplitzMatrix(vector<vector<int>>& matrix) {
for (int i = 1; i < matrix.size(); ++i) {
for (int j = 1; j < matrix[i].size(); ++j) {
if (matrix[i][j] != matrix[i - 1][j - 1]) {
return false;
}
}
}
return true;
}
};