#include <iostream>
#include <vector>
#include <map>
#include <atcoder/modint>
using namespace std;
using ll = long long;
using ull = unsigned long long;
#define rep(i,n) for(int i=0; i<(n); i++)


using mll = atcoder::static_modint<1000000007>;


ull N;
mll A,B,K;

int main(){
  cin >> N;
  { int a,b,k; cin >> a >> b >> k; A=a; B=b; K=k; }
  if(N >= 1000000) exit(0);
  rep(i,N-1){
    mll C = (B * B + K) / A;
    A = B; B = C;
  }
  cout << A.val() << "\n";
  return 0;
}

struct ios_do_not_sync{
  ios_do_not_sync(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
  }
} ios_do_not_sync_inst;