Pair with Difference K

You are given an array of n integers and an integer K. Your task is to determine whether there exist two indices i and j with i < j such that the absolute difference between the corresponding elements is exactly K. Formally, you need to check if there exists a pair (i, j) such that

$\lvert a_i - a_j \rvert = K$

If such a pair exists output YES, otherwise output NO.

inputFormat

The input is given from stdin and consists of two lines. The first line contains two integers n and K, where n is the length of the array. The second line contains n space-separated integers representing the elements of the array.

Constraints: It is guaranteed that the input values fit within the range of common programming language integer types.

outputFormat

Print a single line to stdout containing either YES if there exists a pair of indices i < j for which the absolute difference is exactly K, or NO otherwise.

5 2
1 5 3 4 2

YES