摘要：
Today, Soda has learned a sequence whosen-th(n≥1)item is3n(n−1)+1. Now he wants to know if an integermcan be represented as the sum of some items of t... 阅读全文
摘要：
Today is the 1st anniversary of BestCoder. Soda, the contest manager, gets a stringsof lengthn. He wants to find three nonoverlapping substringss[l1..... 阅读全文