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++14 (Clang 3.8.0) (judge verdict: Accepted)

#include<iostream>

using namespace std;

int a, b, c, d, e, k;
int cell[5];

bool judge(){
  bool dis = true;
  /*
  if(b - a > k){
    dis = false;
  }else if(c - b > k){
    dis = false;
  }else if(d - c > k){
    dis = false;
  }else if(e - d > k){
    dis = false;
  }else{
    dis = true;
  }
  */
 for(int i = 0; i < 5; ++i){
   for(int j = i + 1; j < 5; ++j){
     if(cell[j] - cell[i] > k){
       dis = false;
     }
   }
 }
  return dis;
}

int main(){
  cin >> a >> b >> c >> d >> e >> k;
  for(int i = 0; i < 5;++i){
    cell[0] = a;
    cell[1] = b;
    cell[2] = c;
    cell[3] = d;
    cell[4] = e;
  }
  if(judge() == true){
    cout << "Yay!" << endl;
  }else{
    cout << ":(" << endl;
  }
}