#include<iostream> using namespace std; int main() { int n; cin >> n; for(int i = 1;i <= n;i++) { for(int j = 1;j <= n - i;j++) cout << " "; for(int j = 1;j <= (2 * i - 1)/2+1;j++) cout << j; for(int j = (2 * i - 1)/2;j >= 1;j--) cout << j; cout << endl; } for(int i = n - 1;i >= 1;i--) { for(int j = n - i;j >= 1;j--) cout << " "; for(int j = 1;j <= (2 * i - 1)/2+1;j++) cout << j; for(int j = (2 * i - 1)/2;j >= 1;j--) cout << j; cout << endl; } return 0; }