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Обсуждение задачи 1325. Грязь

wa 22 and then mysteriously AC: don't know why?
Послано Radi Muhammad Reza 14 авг 2011 15:11
when trying to update from (ux,uy) to (vx,vy)  i was checking if (vx,vy) was already popped from priority_queue.

this got me wa 22 many times. later, just out of frustation i removed the check and let (vx,vy) be updated even after it was once popped. and u know what, mysteriously got AC. of course, there has to be some logical explanation behind that.

please explain anyone?

Thanks in advance.
Re: wa 22 and then mysteriously AC: don't know why?
Послано shad 2 янв 2012 22:16
I followed by your advice, and also suprised!