#include <bits/stdc++.h>
using namespace std;
int main() {
  int A, B, C, X, Y;
  cin >> A >> B >> C >> X >> Y;
  int ans = 1e7;
  for (int i = 0; i < 200000; i++) {
    int sum = C * i;
    int a = X - i / 2;
    int b = Y - i / 2;
    if (0 < a) sum += a * A;
    if (0 < b) sum += b * B;
    ans = min(ans, sum);
  }
  cout << ans << endl;
}
