Solve this code in any language java python C c++

Question

You are given an array of size , where the integer of the array is and its value ranges between and inclusive. You are required to complete the following task:

Assume that you are provided with additional numbers , , and . Your task is to report the number of unordered pairs of elements from this array, such that , , and .

Input format

First line: Four space-separated integers , , , and
Next line: space-separated integers where the integer denotes
Output format

Print the required number of ordered pairs of array elements in a single line. As the answer could be rather large, be careful of integer overflows.

Constraints

Sample Input
5 2 1 0
1 2 3 2 1
Sample Output
6

Answer 1

You have to show your code or at least explain what is the problem

Answer 2

This is the hackerearth questions...n I need explanation and coding of this problem

Answer 3

Looks like you have to check how many pairs of integers there are, where for example:

(a[i] == a[i+1] - 1) or (a[i] == a[i+1] + 1)

You have to iterate thru both arrays and check for these pairs