Problem:
﻿Score: 100 points

Problem Statement

In AtCoder city, there are five antennas standing in a straight line. They are called Antenna A, B, C, D and E from west to east, and their coordinates are a, b, c, d and e, respectively.

Two antennas can communicate directly if the distance between them is k or less, and they cannot if the distance is greater than k.

Determine if there exists a pair of antennas that cannot communicate directly.

Here, assume that the distance between two antennas at coordinates p and q (p < q) is q - p.

Constraints

a, b, c, d, e and k are integers between 0 and 123 (inclusive).

a < b < c < d < e

Input

Input is given from Standard Input in the following format:

a
b
c
d
e
k

Output

Print :( if there exists a pair of antennas that cannot communicate directly, and print Yay! if there is no such pair.

Sample Input 1

1
2
4
8
9
15

Sample Output 1

Yay!

In this case, there is no pair of antennas that cannot communicate directly, because:

the distance between A and B is 2 - 1 = 1

the distance between A and C is 4 - 1 = 3

the distance between A and D is 8 - 1 = 7

the distance between A and E is 9 - 1 = 8

the distance between B and C is 4 - 2 = 2

the distance between B and D is 8 - 2 = 6

the distance between B and E is 9 - 2 = 7

the distance between C and D is 8 - 4 = 4

the distance between C and E is 9 - 4 = 5

the distance between D and E is 9 - 8 = 1

and none of them is greater than 15. Thus, the correct output is Yay!.

Sample Input 2

15
18
26
35
36
18

Sample Output 2

:(

In this case, the distance between antennas A and D is 35 - 15 = 20 and exceeds 18, so they cannot communicate directly.
Thus, the correct output is :(.

Solution in Rust (1.15.1) (judge verdict: Accepted)

use std::io::stdin;

macro_rules! read {
    ($t: ty) => {{
        let mut line = String::new();
        stdin().read_line(&mut line);
        line.trim().parse::<$t>().unwrap()
    }};
    ($($t: ty), *) => {{
        let mut line = String::new();
        stdin().read_line(&mut line);
        let mut iter = line.split_whitespace();
        (
            $(iter.next().unwrap().parse::<$t>().unwrap(), )*
        )
    }}
}
macro_rules! reads {
    ($e:expr, $t:ty) => {{
        let mut v = vec![];
        for _ in 0..$e {
            let mut line = String::new();
            stdin().read_line(&mut line);
            v.push(line.trim().parse::<$t>().unwrap());
        }
        v
    }};
}

fn main() {
    let a = read!(u32);
    let b = read!(u32);
    let c = read!(u32);
    let d = read!(u32);
    let e = read!(u32);
    let k = read!(u32);

    if b - a > k {
        println!(":(");
        return;
    }
    if c - a > k {
        println!(":(");
        return;
    }
    if d - a > k {
        println!(":(");
        return;
    }
    if e - a > k {
        println!(":(");
        return;
    }
    println!("Yay!");
}