Score: 100 points
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.
Input is given from Standard Input in the following format:
a b c d e k
Print :(
if there exists a pair of antennas that cannot communicate directly, and print Yay!
if there is no such pair.
1 2 4 8 9 15
Yay!
In this case, there is no pair of antennas that cannot communicate directly, because:
and none of them is greater than 15. Thus, the correct output is Yay!
.
15 18 26 35 36 18
:(
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 :(
.