#include<bits/stdc++.h> using namespace std; long long a[105]; int main(){ int n; cin>>n; cin>>a[1]>>a[2]>>a[3]>>a[4]; if(a[2]-a[1] == a[4]-a[3]){ for(int i=2;i<=n;i++){ a[i] = a[i-1]+(a[2]-a[1]); } } else{ for(int i=2;i<=n;i++){ a[i] = a[i-1]*(a[2]/a[1]); } } cout<<a[n]; return 0; }