PROBLEM LINK:
CodeChef: Practical coding for everyone
Author: acesprime
Tester: acesprime
Editorialist: acesprime
DIFFICULTY:
MEDIUM.
PREREQUISITES:
Array
PROBLEM:
Problem is to arrange numbers from 1 to N in such a way that absolute value of difference of the ith number from the position of ith number in the arrangement , to be equal to a certain value K.