For every python code , I am getting runtime NZEC error .
problem link : https://www.codechef.com/problems/LAPIN
solution link : https://www.codechef.com/submit/LAPIN
As raw_input() is not defined , i am unable to use this
That’s not the correct ink for your submission 
This is the link to your latest submission, and it fails on the sample test input (your output has to match the expected output exactly, remember!).
Try putting your code inside a try-except block as in this for a workaround and do debug your code !
I just resolved the issue , still it is not working :
https://www.codechef.com/viewsolution/33171646