Problem:
Score : 300 points

Problem Statement

"Pizza At", a fast food chain, offers three kinds of pizza: "A-pizza", "B-pizza" and "AB-pizza". A-pizza and B-pizza are completely different pizzas, and AB-pizza is one half of A-pizza and one half of B-pizza combined together. The prices of one A-pizza, B-pizza and AB-pizza are A yen, B yen and C yen (yen is the currency of Japan), respectively.

Nakahashi needs to prepare X A-pizzas and Y B-pizzas for a party tonight. He can only obtain these pizzas by directly buying A-pizzas and B-pizzas, or buying two AB-pizzas and then rearrange them into one A-pizza and one B-pizza. At least how much money does he need for this? It is fine to have more pizzas than necessary by rearranging pizzas.

Constraints

1 ≤ A, B, C ≤ 5000

1 ≤ X, Y ≤ 10^5

All values in input are integers.

Input

Input is given from Standard Input in the following format:

A B C X Y

Output

Print the minimum amount of money required to prepare X A-pizzas and Y B-pizzas.

Sample Input 1

1500 2000 1600 3 2

Sample Output 1

7900

It is optimal to buy four AB-pizzas and rearrange them into two A-pizzas and two B-pizzas, then buy additional one A-pizza.

Sample Input 2

1500 2000 1900 3 2

Sample Output 2

8500

It is optimal to directly buy three A-pizzas and two B-pizzas.

Sample Input 3

1500 2000 500 90000 100000

Sample Output 3

100000000

It is optimal to buy 200000 AB-pizzas and rearrange them into 100000 A-pizzas and 100000 B-pizzas. We will have 10000 more A-pizzas than necessary, but that is fine.

Solution in Ruby (2.3.3) (judge verdict: Accepted)

a,b,c,x,y = gets.chomp.split.map(&:to_i)
# a b c x y
# a:a b:b c:ab x:apizzaの枚数 y:bpizzaの枚数

# 底の部分ではabとa+bのどっちがとくか
# あまりの部分ではa(b)とabのどっちが得かという話

sum = 0
if x>=y
  if a+b <= 2*c
    sum+=[x,y].min*(a+b)
  else
    sum+=[x,y].min*c*2
  end
  if a <= c*2
    sum+=([x,y].max-[x,y].min)*a
  else
    sum+=([x,y].max-[x,y].min)*2*c
  end
else
  if a+b <= 2*c
    sum+=[x,y].min*(a+b)
  else
    sum+=[x,y].min*c*2
  end
  if b <= c*2
    sum+=([x,y].max-[x,y].min)*b
  else
    sum+=([x,y].max-[x,y].min)*2*c
  end
end

puts(sum)