Minimum Cost for Park Tickets

Little A goes to the park with the family. The ticket price list is shown below:

There are x adults and y children in Little A's family. The park offers three types of tickets:

• Adult Ticket: \(25\) dollars per adult.
• Child Ticket: \(12\) dollars per child.
• Family Ticket: \(40\) dollars which covers 2 adults and 2 children.

You can purchase any combination of tickets. Note that if you buy a family ticket, it covers exactly 2 adults and 2 children. For any remaining people who cannot be grouped into a family ticket, you must buy individual tickets. Calculate the minimum total amount required to buy tickets for the whole family.

Note: You are allowed to purchase 0 or more family tickets. For each possible number \(k\) (where \(0 \le k \le \min(\lfloor x/2\rfloor, \lfloor y/2\rfloor)\)), the total cost is:

\[ \text{cost} = k\times40 + (x-2k)\times25 + (y-2k)\times12. \]

Your task is to output the minimum cost possible.

inputFormat

The input consists of a single line containing two integers x and y (0 ≤ x, y ≤ 1000), representing the number of adults and children, respectively.

outputFormat

Output a single integer which is the minimum total cost for the family tickets.

sample

1 2

49