You are given with an array of integers and an integer K. You have to find and print the count of all such pairs which have difference K.
Note: Take absolute difference between the elements of the array.
Input Format:
The first line of input contains an integer, that denotes the value of the size of the array. Let us denote it with the symbol n.
The following line contains n space separated integers, that denote the value of the elements of the array.
The following line contains an integer, that denotes the value of K.
Output format :
The first and only line of output contains count of all such pairs which have an absolute difference of K.
Constraints :
0 <= n <= 10^4
Time Limit: 1 sec