Why am i getting nzec??

Can someone please tell me why i am getting nzec error in this code…

I guess this is related to ongoing contest so please have some patience let the contest end and then post your questions in the forum. I dont have permission to access your code because possibly u submitted it for some contest problem

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@vijju123 can you please close this question!!

Its fine if its related to that ZCO practice contest. Else its a 10 day ban. @komal024 , can you please tell?