Regarding error on non custom input

[hrushi20]

I keep getting this following error whenever i try To use non-custom input
Though it work properly on custom Input But after submitting answer it Tells solution is in correct
Traceback (most recent call last):
File “./prog.py”, line 2, in
EOFError: EOF when reading a line

[ssjgz]

New to Codechef. Can't understand the platform

One thing that trips up all people migrating from Hackerrank (hello :)) is that clicking “Run” (not “Submit”) here on Codechef does not run your code with the sample testcases - instead, it runs it with empty input (so attempts to read anything from stdin will fail, or give weird values). If you click “Run”, you must provide Custom Input.