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

using pint = pair< int, int >;
using ull = unsigned long long;

template< typename T >
void output( T&& range )
{
    for_each(
        begin( range ),
        end( range ),
        []( auto&& t )
        {
            cerr << t << endl;
        }
    );
}


int main()
{
    ull n = 0;
    cin >> n;
    cout << 316 + 52 * ( n - 1 ) << endl;
}