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 Rust (1.15.1) (judge verdict: Accepted)

use std::io::Read;
use std::io::{stdout, BufWriter, Write};

fn main() {
    let mut buf = String::new();

    // stdinから全てbufに読み込む
    std::io::stdin().read_to_string(&mut buf).unwrap();

    // 読み込んだ文字列をスペースで分解する
    let mut iter = buf.split_whitespace();

    // about a
    let a: usize = iter.next().unwrap().parse().unwrap();
    // about b
    let b: usize = iter.next().unwrap().parse().unwrap();

    // ans
    let ans: usize = if a >= 13 {
        b
    } else if a >= 6 && a <= 12 {
        b / 2
    } else {
        0
    };

    // 出力
    let out = stdout();
    let mut out = BufWriter::new(out.lock());
    writeln!(out, "{}", ans).unwrap();
}