why this get wa??

Правка en2, от showvike, 2020-01-05 16:57:42

see this link: https://codeforces.com/contest/1284/submission/68190516

ios_base :: sync_with_stdio(false); cin.tie(NULL);

when remove this two line it got ac.. but before wa.. why and how??

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en2 Английский showvike 2020-01-05 16:57:42 8
en1 Английский showvike 2020-01-05 16:56:28 219 Initial revision (published)