#include<bits/stdc++.h>
#define rep(i,a,n) for (int i = a;i < n;i++)
#define per(i,n,a) for (int i = n-1;i >= a;i--)
using namespace std;

int main(){
    long long n;
    cin >> n;
    cout << 316 + (n-1) * 52 << endl;
}