#include <iostream> using namespace std; void printLine(int i, int n) { cout << string(n - i, ' '); for (int j = 1; j <= i; j++) cout << j; for (int j = i - 1; j >= 1; j--) cout << j; cout << "\n"; } int main() { int n; while (cin >> n) { for (int i = 1; i <= n; i++) printLine(i, n); for (int i = n - 1; i >= 1; i--) printLine(i, n); } return 0; }