#include <bits/stdc++.h>
using namespace std;
typedef int64_t ll;


void solve() {
  cin.tie(nullptr);
  ios::sync_with_stdio(false);
  ll n;
  cin >> n;
  string s;
  ll cnt=1;
  for(ll i=n*n-1;i>=0;i--){
    s.push_back('0'+cnt);
    cnt++;
    if(cnt==n+1){
      cnt=1;
    }
  }
  cout<<s<<endl;
} 

int main() { solve();system("pause"); }