#include <iostream> #include <cstdio> #include <cstdlib> #include <math.h> #include <vector> #include <queue> #include <algorithm> #include <sstream> #include <string> #include <map> using namespace std; #define FOR(I,N) for(int I = 0; I < (int)(N); I++) #define FIN(V) cout<<V<<endl #define pb push_back #define INF (1 << 30) #define ll long long typedef pair<int, int> P; string sValueOf(int v){stringstream ss;ss<<v;return ss.str();} int parseInt(string v){int i;stringstream ss(v);ss>>i;return i;} void fast_io() {cin.tie(0); ios::sync_with_stdio(false);} int main(){ int i,j; ll n; cin>>n; ll ans = (n-1)*52+316; cout<<ans<<endl; return 0; }