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 Python (3.4.3) (judge verdict: Accepted)

A, B, C, X, Y = map(int, input().split())

## min(Ax + By + Cz) = min((A+0.5C)x + (B+0.5C)y)
# Xyen = Ai + 2Cj, Yyen = Bk + 2Cj, X = i +2j, Y = k + 2j
# Xyen + Yyen = AX + BY + 2(C-A)j + 2(C-B)j, jを求めればok?

# l = []
# for j in range(max(X,Y)+1):
#     if j <= X+Y:
#         l.append(A*X + B*Y + (C-A*0.5-B*0.5)*j)

# print(int(min(l)))

X1 = X
Y1 = Y
price = []
for i in range(0, max(X,Y)+1):
    price.append(max(0,(X1-i))*A+max(0,(Y1-i))*B+2*i*C) 
print(min(price))