#include <bits/stdc++.h>

using namespace std;

int main() {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  int N;
  cin >> N;
  vector<vector<int>> X(N, vector<int>(N, 0));
  for (int i = 0; i < N; i++) {
    X[i][i] = i;
    int cur = 0;
    for (int j = 0; j < N; j++) {
      if (j == i) {
        X[i][j] = i;
      } else {
        X[i][j] = cur;
      }
      cur++;
    }
  }
  for (auto x : X) {
    for (const auto& e : x) {
      cout << e + 1 << (&e == &x.back() ? '\n' : ' ');
    }
  }
  return 0;
}