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如排名所示，又是一场自己吃s。A的贪心始终过不去，寄了寄了。
没怎么看其它题，除了D和G。现在就逆天了
D看不懂题傻逼了，我还觉得它样例有问题，实际上是一个简单题；
G完全看错题了，我还在想怎么维护这个动态的倍增；结果就是倍增即可，搞错题意了。