摘要：
Consider the infinite sequence ss of positive integers, created by repeating the following steps: Find the lexicographically smallest triple of positi 阅读全文
posted @ 2020-04-15 11:10
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摘要：
You have unweighted tree of nn vertices. You have to assign a positive weight to each edge so that the following condition would hold: For every two d 阅读全文
posted @ 2020-04-15 09:29
XXXSANS
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摘要：
You have array of nn numbers a1,a2,…,ana1,a2,…,an. Rearrange these numbers to satisfy |a1−a2|≤|a2−a3|≤…≤|an−1−an||a1−a2|≤|a2−a3|≤…≤|an−1−an|, where |x 阅读全文
posted @ 2020-04-15 09:17
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