SebiSebi's blog

SPOJ — Play with a tree
By SebiSebi, history, 9 years ago, In English

Can someone give me a hint on this problem: http://www.spoj.com/problems/PT07A/. I cannot figure out how to calculate the SG numbers.

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9 years ago, # |
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I did some research — you can use the colon principle, but not sure how.

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