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Discussion of Problem 1776. Anniversary Firework

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give answers for N= 11, 12, 13, 14, 15, 16, 17 Vasily Slesarev 23 May 2011 20:35
I have WA8, N = 17 in this test.
Please give answers!
Thank you.



Edited by author 29.05.2011 13:58
The answer is 68.3998769.
Bless!