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 (GCC 5.4.1) (judge verdict: Runtime Error)

#include <stdio.h>
#include <stdlib.h>

int compare_int(const void *a, const void *b){
  return *(int*)b - *(int*)a;
}

int main(void){
  int n, m, ret, tmp, b, c, i, j; 
  long sum = 0;
  
  ret = scanf("%d %d", &n, &m);
  
  int card[n*(m+1)];
  
  i = 0;
  while(i < n){
    ret = scanf("%d ", &card[i]);
    i++;
  }

  j = 0;
  while(j < m){
    ret = scanf("%d %d", &b, &c);
    for(int k = 0; k < b; k++){
      card[i] = c;
      i++;
    }
    j++;
  }

  qsort(card, i, sizeof(int), compare_int);
  
  for(int k = 0; k < n; k++){
    sum = sum + (long)card[k];
  }
  
  printf("%ld\n", sum);
  
  return 0;
}