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: Wrong Answer)

#include <stdio.h>
int main(void){
	int n,m,l[100000],r[100000],i,j,a[100000]={1},b=0;
	scanf("%d %d",&n,&m);
	for(i=1;i<=m;i++) scanf("%d %d",&l[i],&r[i]);
	
	for(i=1;i<=m;i++){
		for(j=1;j<l[i];j++) a[j]=0;
		for(j=r[i];j<=n;j++) a[j]=0;
	}
	for(i=1;i<=n;i++){
		if(a[i]==1) b++;
	}
	printf("%d",b);
	return 0;
}