#include <bits/stdc++.h>

using namespace std;

ifstream in("koba.in");
ofstream out("koba.out");

const int DIM = 1e3 + 7;

int viz[DIM];

vector <int> sp;

int main()
{
    int n, x,  y , z;
    in >> n >> x >> y >> z;

    x = x % 10;
    y = y % 10;
    z = z % 10;

    if(n <= 3)
    {
        if(n == 1)
            out << x;
        else
        if(n == 2)
            out << y;
        else
        if(n = 3)
            out << z;
        return 0;
    }


    viz[x * 100 + y * 10 + z] = 3;

   n-= 3;

   int rez = x + y + z;

   sp.push_back(x);
   sp.push_back(sp[sp.size() - 1] + y);
   sp.push_back(sp[sp.size() - 1] + z);



   for(int i = 1; i <= n; i++)
   {
       int q = (z + (y * x) % 10) % 10;


        x = y;
        y = z;
        z = q;
        rez += q;
       sp.push_back(sp[sp.size() - 1] + q);

       if(viz[x * 100 + y * 10 + z] == 0)
        {
            viz[x * 100 + y * 10 + z] = i + 3;

        }
       else
       {

           rez = rez - z - y - x;

           int p = sp[sp.size() - 4] - sp[viz[x * 100 + y * 10 + z] - 4];

            int lp = sp.size() - 4 - viz[x * 100 + y * 10 + z] + 4;

            rez += (n - i + 3) / lp * p;

            int r = (n - i + 3) % lp;

            rez += sp[viz[x * 100 + y * 10 + z] - 4 + r] - sp[viz[x * 100 + y * 10 + z] - 4];


           out << rez;
           return 0;
       }


   }


   out << rez;
    return 0;
}