#include <iostream> #include <vector> using namespace std; int main() { int n; cin >> n; vector<vector<int> > matrix(n, vector<int>(n, 0)); int k = (n + 1) * n / 2; int x = 0, y = 0; for(int i = 1; i <= k; ++i) { if(x >= 0 && y >= 0 && x < n && y < n) { matrix[x][y] = i; } if(x == 0) { x = y + 1; y = 0; } else { --x; ++y; } } for(int i = 0; i < n; ++i) { for(int j = 0; j < n - i; ++j) { cout << matrix[i][j]; if(j == n - i - 1) cout << endl; else cout << " "; } } return 0; }