#include <bits/stdc++.h>
using namespace std;
int main() {
  int A, B, C, X, Y;
  int ans = 2e9;
  cin >> A >> B >> C >> X >> Y;
  for (int k = 0; k <= 2 * max(X, Y); k++)
    ans = min(max((X - k / 2) * A, 0) + max((Y - k / 2) * B, 0) + k * C, 0);
  cout << ans << endl;
  return 0;
}
