摘要：
Harmonious Army 题目描述 Now, Bob is playing an interesting game in which he is a general of a harmonious army. There are n soldiers in this army. Each so 阅读全文
摘要：
Operation 题目描述 There is an integer sequence a of length n and there are two kinds of operations:0 l r: select some numbers from al...ar so that their 阅读全文