Enormous input runtime error

enormous
error
input

#1

This is link to solution!!It compiles fine in my compiler but fails in codechef compiler!!!
https://www.codechef.com/viewsolution/14414251


#2

Increase your array size first. Why is it only upto 30 when number of elements can be till 10^7?

Also, you dont need to verify n and k, they will be according to constraints