Problem
Given an array and integer K, determine if there is a pair with absolute difference K. Print "YES" or "NO".
Input format
Input
input.txt
- The first line contains N and K (1 ≤ N ≤ 100, 0 ≤ K ≤ 1000). - The second line contains N integers.
Output format
Output
output.txt
- "YES" or "NO".
Example
input
5 3 1 8 30 40 7
output
YES
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Sample cases (from the problem)
Sample Case 1
Input
5 3 1 8 30 40 7
Expected output
YES
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