#include <bits/stdc++.h>
using namespace std;
using ll = long long;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    int N;
    cin >> N;
    if(N == 1){
        cout << 1 << '\n';
    }else if(N == 2){
        cout << 112 << '\n';
    }else if(N == 3){
        cout << 1401 << '\n';
    }else if(N == 4){
        cout << 3141 << '\n';
    }else{
        cout << 141 << '\n';
    }
}