#include <iostream>
#include <vector>
using namespace std;
typedef long long ll;

int main() {
  int n, m, k; cin >> n >> m >> k;
  char op; cin >> op;
  ll sumb = 0;
  for (int i = 0; i < m; i++) {
    ll b; cin >> b;
    sumb = (sumb + b) % k;
  }
  ll ans = 0;
  for (int i = 0; i < n; i++) {
    ll a; cin >> a;
    if (op == '+')
      ans = (ans + a * m + sumb) % k;
    else
      ans = (ans + a * sumb) % k;
  }
  cout << ans << endl;
}