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

#define int long long

signed main(){

    int n, m;
    cin >> n >> m;
    int k;
    cin >> k;

    char op;
    cin >> op;

    int a[100010];
    int b[100010];
    int sum = 0;

    for(int i = 0;i < m;i++){
        cin >> b[i];
        sum = (sum + b[i]) % k;
    }

    for(int i = 0;i < n;i++) cin >> a[i];

    int ans = 0;
    for(int i = 0;i < n;i++){
        if(op == '+'){
            ans += a[i] * m % k + sum; 
            ans %= k;
        }else{
            ans += a[i] * sum % k;
            ans %= k;
        }
    }
	
    cout << ans << endl;

    return 0;
}