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 C (Clang 3.8.0) (judge verdict: Accepted)

#include<stdio.h>
int main()
{
  int a,b,c,d,e,k,f,j,h,t,i,x,z,m,n,p;
  scanf("%d%d%d%d%d%d",&a,&b,&c,&d,&e,&k);
  f=b-a;
  i=c-a;
  j=d-a;
  z=e-a;
  x=c-b;
  m=d-b;
  n=e-b;
  h=d-c;
  p=e-c;
  t=e-d;
  if(f<=k && i<=k && j<=k && z<=k && x<=k && m<=k && n<=k && h<=k && p<=k && t<=k){
    printf("Yay!");}
	
  else if(f>k || i>k || j>k || z>k || x>k || m>k || n>k || h>k || p>k || t>k){
    printf(":(");}
}