#include <bits/stdc++.h>
using namespace std;
int main() {
  int a, b, c, x, y;
  cin >> a >> b >> c >> x >> y;
  int price = a * x + b * y, Tprice;
  for (int i = 2; i <= 100000; i++) {
    Tprice = i * 2 * c + max(0, x - i) * a + max(0, y - i) * b;
    price = min(price, Tprice);
  }
  cout << price << endl;
}
