This is my solution link for the question.
https://www.codechef.com/viewsolution/15021131
please anyone help to find where it fails.
What’s your problem link? Please update the question.
We can see the problem from the link he gave 
This is my solution link for the question.
https://www.codechef.com/viewsolution/15021131
please anyone help to find where it fails.
What’s your problem link? Please update the question.
We can see the problem from the link he gave