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back to boardI don't know why my code works. My solution only outputs alpha=180. Is there any case that it's possible and alpha can't be 180? Re: I don't know why my code works. Posted by  MVM 4 May 2015 14:58 Alpha can always be 180. Re: I don't know why my code works. Oh Yes! Understanding this fact makes the problem being quite easy. The only problem is to output points with |coordinates| <= 2000. But I didn't have to care about it because of weak tests. Re: I don't know why my code works. del   Edited by author 06.05.2015 12:45  |  
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