#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#include<bits/stdtr1c++.h>
#define int long long
using namespace std;
constexpr int mod=998244353;
signed main(){
    int q,a,b;
    cin>>q>>a>>b;
    cout<<b*(b+1)/2%17<<endl;
}