#include <bits/stdc++.h>

using ll = long long;

using namespace std;

int main()
{
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    ll n,m,k;
    string op;
    cin >> n >> m >> k >> op;

    ll a,b,sa{0},sb{0},res;
    
    for (int i=0;i<m;++i)
    {
        cin >> b;
        sb+=b;
    }
    for (int i=0;i<n;++i)
    {
        cin >> a;
        sa+=a;
    }
    
    sa %= k;
    sb %= k;

    if (op == "+")
        res = (sa * m + sb * n) % k;
    else
        res = sa * sb % k;

    cout << res << "\n";

    return 0;
}