Can anyone explain me reason for runtime error in my code

Revision en1, by OneClickAC, 2016-12-22 21:33:41

This is the attached link for my code..(Problem-659B) http://pastebin.com/UBV4KPf0

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en1 English OneClickAC 2016-12-22 21:33:41 140 Initial revision (published)