#include <bits/stdc++.h>
#define rep(i, n) for(int i = 0; i < (int)(n); i++)
#define all(x) (x).begin(),(x).end()
#define rall(x) (x).rbegin(),(x).rend()
#define UNIQUE(v) v.erase( unique(v.begin(), v.end()), v.end() );
using namespace std;
using ll = long long;
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }
const ll INF = 1e9;
const ll MOD = 1e9 + 7;


int main(){
    ll n, m, k;
    cin >> n >> m >> k;
    string op;
    cin >> op;

    ll sum = 0;
    rep(i, m){
        ll b; cin >> b;
        sum += b;
    }
    sum %= k;

    ll ans = 0;
    rep(i, n){
        ll a; cin >> a;
        if(op == "+") ans += ((m*a)%k + sum);
        else ans += (a*sum);
        ans %= k;
    }
    cout << ans << endl;
}