#include <iostream>
#include <vector>
#include <numeric>

using namespace std;

using int64 = long long;

int main() {
    cin.tie(nullptr); ios::sync_with_stdio(false);
    int n,m,k;
    cin >> n >> m >> k;
    char op; cin >> op; bool plus = op == '+';

    vector<int> bk(k,0);
    vector<int> ak(k,0);

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

    for (i=0; i<n; i++) {
        cin >> a;
        ak[a % k]++;
    }


    int64 ans = 0;
    if (plus) {
        for (i=0; i<k; i++) {
            ans += ak[i] * bk[(k-i)%k];
        }
    } else {
        ans += (int64)ak[0] * m;
        ans += (int64)bk[0] * n;
        for (i=2; i<k; i++) {
            int tmp = k / gcd(k, i);
            for (j=tmp; j<k; j+=tmp) {
                ans += (int64)ak[i]*bk[j];
            }
        }
    }

    cout << ans << endl;
}