Problem:
Score : 100 points

Problem Statement

Takahashi, who is A years old, is riding a Ferris wheel.

It costs B yen (B is an even number) to ride the Ferris wheel if you are 13 years old or older, but children between 6 and 12 years old (inclusive) can ride it for half the cost, and children who are 5 years old or younger are free of charge. (Yen is the currency of Japan.)

Find the cost of the Ferris wheel for Takahashi.

Constraints

0 ≤ A ≤ 100

2 ≤ B ≤ 1000

B is an even number.

Input

Input is given from Standard Input in the following format:

A B

Output

Print the cost of the Ferris wheel for Takahashi.

Sample Input 1

30 100

Sample Output 1

100

Takahashi is 30 years old now, and the cost of the Ferris wheel is 100 yen.

Sample Input 2

12 100

Sample Output 2

50

Takahashi is 12 years old, and the cost of the Ferris wheel is the half of 100 yen, that is, 50 yen.

Sample Input 3

0 100

Sample Output 3

0

Takahashi is 0 years old, and he can ride the Ferris wheel for free.

Solution in C# (Mono 4.6.2.0) (judge verdict: Runtime Error)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

class Program
{
    static void Main(string[] args)
    {
        string[] input = Console.ReadLine().Split(' ');
        int a = int.Parse(input[0]);
        int b = int.Parse(input[1]);
        List<long> num = new List<long>();
        string[] input2 = Console.ReadLine().Split(' ');
        for (int i = 0; i < a; i++)
        {
            num.Add(int.Parse(input2[i]));
        }
        num.Sort();
        for (int i = 0; i < b; i++)
        {
            string[] input3 = Console.ReadLine().Split(' ');
            int aa = int.Parse(input3[0]);
            long bb = long.Parse(input3[1]);
            for(int j = 0; j < aa; j++)
            {
                if (num[j] < bb) num[j] = bb;
                else break;
            }
            num.Sort();
        }
        long sum = num.Sum();
        Console.WriteLine(sum);
    }
}