Pair With Given Difference

Given an one-dimensional unsorted array A containing N integers.

You are also given an integer B, find if there exists a pair of elements in the array whose difference is B.

Return 1 if any such pair exists else return 0.

• 1 <= N <= 10⁵
• -10³ <= A[i] <= 10³
• -10⁵ <= B <= 10⁵

First argument is an integer array A of size N.

Second argument is an integer B.

Return 1 if any such pair exists else return 0.

Input 1:

 A = [5, 10, 3, 2, 50, 80]
 B = 78

Input 2:

 A = [-10, 20]
 B = 30

Output 1:

 1

Output 2:

 1

Explanation 1:

 Pair (80, 2) gives a difference of 78.

Explanation 2:

 Pair (20, -10) gives a difference of 30 i.e 20 - (-10) => 20 + 10 => 30