Score : 100 points
Three people, A, B and C, are trying to communicate using transceivers. They are standing along a number line, and the coordinates of A, B and C are a, b and c (in meters), respectively. Two people can directly communicate when the distance between them is at most d meters. Determine if A and C can communicate, either directly or indirectly. Here, A and C can indirectly communicate when A and B can directly communicate and also B and C can directly communicate.
Input is given from Standard Input in the following format:
a b c d
If A and C can communicate, print Yes
; if they cannot, print No
.
4 7 9 3
Yes
A and B can directly communicate, and also B and C can directly communicate, so we should print Yes
.
100 10 1 2
No
They cannot communicate in this case.
10 10 10 1
Yes
There can be multiple people at the same position.
1 100 2 10
Yes