#include "bits/stdc++.h"
using namespace std;
using ll = long long;
using ld = long double;
using P = pair<int, int>;
using vi = vector<int>;
using vvi = vector<vi>;
const int INF = 1e9;
#define rep(i, n) for(int i = 0; i < (n); i++)
#define rep2(i, x, n) for(int i = x; i < (n); i++)
#define all(n) begin(n), end(n)
const long long llINF = 1LL << 60;

void Main() {
    ll n;
    ll ans = 316;
    cin >> n;
    ans += (n - 1) * 52;
    cout << ans << endl;
}

int main() {
    std::cin.tie(nullptr);
    std::ios_base::sync_with_stdio(false);
    std::cout << std::fixed << std::setprecision(15);
    Main();
    return 0;
}