#include<iostream>
#include<iomanip>
#include<cmath>
#include<string>
#include<algorithm>
#include<vector>
#include<math.h>

using namespace std;
int main(){
    long N;
    cin >> N;
    if(N == 1){
        cout << 316 << endl;
    }else{
        long long ans = 316 + (N-1) * 52;
        cout << ans << endl;
    }
    return 0;
    }