Not able to submit problem in practise

1

I tried submitting this problem https://www.codechef.com/AM19MOS/problems/EXPCAN . I was able to submit it only once and after that It says Problem not available to submit. Why does this happen?

2

try EXPCAN Problem - CodeChef

your url seems to lead to a contest version of the problem.

3

Yeah, that worked. Thank You!