#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using vll = vector<long long>;

int main() {
    ll p1, p2, n;
    cin >> p1 >> p2 >> n;
    unordered_map<ll, ll> mp;
    for (ll i = 0; i < n; i++) {
        ll r;
        cin >> r;
        if (mp.find(r) != mp.end()) {
            mp[r]++;
        } else {
            mp[r] = 0;
        }
    }
    ll s = 0;
    for (const auto &i : mp) {
        s += i.second;
    }
    ll ans = (p1 + p2) * s;
    cout<<ans<<endl;

    system("pause");
}