#include <bits/stdc++.h>
using namespace std;
int main() {
  long long int a, b, c, x, y, z = 0;
  long long int result;
  cin >> a >> b >> c >> x >> y;
  result = a * x + b * y;
  while (true) {
    if (x == 0 || y == 0) break;
    if (a + b >= c * 2) {
      x--;
      y--;
      z += 2;
      result = a * x + b * y + c * z;
    }
  }
  cout << result << endl;
  return 0;
}
