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 JavaScript (node.js v5.12) (judge verdict: Wrong Answer)

function main(input) {
  var args = input.split("\n");
  var a = parseInt(args[0], 10);
  var b = parseInt(args[1], 10);
  var c = parseInt(args[2], 10);
  var d = parseInt(args[3], 10);
  var e = parseInt(args[4], 10);
  var k = parseInt(args[5], 10);

  if(a-b<k){
	if(a-c<k){
	   if(a-d<k){
		 if(a-e<k){
           if(b-c<k){
             if(b-d<k){
               if(b-e<k){
                 if(c-d<k){
                   if(d-e<k){
		            console.log("Yay!");
		           }else{
		            console.log(":(");
		           }
                 }else{
		           console.log(":(");
		         }
               }else{
		         console.log(":(");
		       }
              }else{
		        console.log(":(");
		      }
            }else{
		    console.log(":(");
		 }
           }else{
		    console.log(":(");
		 }
	   }else{
		console.log(":(");
	   }
	}else{
	    console.log(":(");
	}
  }else{
	console.log(":(");
  }
}
main(require('fs').readFileSync('/dev/stdin', 'utf8'));