#include <bits/stdc++.h>
using namespace std;

using ll = long long int;

int main(){
    ll n, m, k;
    char op;
    cin >> n >> m >> k >> op;
    vector<ll> a(n), b(m);
    ll A, B;
    A = B = 0;
    for(int i=0;i<m;i++){
        cin >> b[i];
        B+=b[i];
        B %= k;
    }
    for(int i=0;i<n;i++){
        cin >> a[i];
        A+=a[i];
        A %= k;
    }
    cout << (op=='+'?(A*m+B*n)%k:A*B%k) << endl;
    return 0;
}