#include<bits/stdc++.h>
using namespace std;
void speed()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
}
const long long maxn=1e7+5;
const long long mod=(1<<32);
double a,b[maxn],c,d,n;
double v[maxn];
double ans;
void solve()
{
    cin>>a>>b[0]>>c>>d>>n;
    for(long long i=1; i<=n; i++)
    {
        b[i]=b[i-1]*c+d;
        b[i]=(long long)b[i]%mod;
        //cout<<b[i-1]<<"->"<<b[i]<<endl;
        v[i]=1;
        for(int i=1;i<=b[i];i++)
        {
            v[i]*=a;
        }
        v[i]=(long long)v[i]%mod;
        ans=((long long)ans^(long long)v[i]);
    }
    cout<<ans<<endl;
}
int main()
{
    freopen("power.in","r",stdin);
    freopen("power.out","w",stdout);
    solve();

    return 0;
}
///SAMO HORATA,DETO NE SA GI PRIELI V UNIVERSITET OBICHAT MATERMATIKATA