摘要：
You are given two integers aa and bb, and qq queries. The ii-th query consists of two numbers lili and riri, and the answer to it is the number of int 阅读全文
posted @ 2020-04-27 16:19
XXXSANS
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摘要：
kefa进入了一家餐厅，这家餐厅中有n个菜（0<n≤18）,kefa对第i个菜的满意度为ai（0≤ai≤10^9），并且对于这n个菜有k个规则，如果kefa在吃完第xi个菜之后吃了第yi个菜（保证xi、yi不相等），那么会额外获得ci（0≤ci≤10^9）的满意度。kefa要吃m道任意的菜（0<m≤ 阅读全文
posted @ 2020-04-27 11:44
XXXSANS
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Let's say string ss has period kk if si=si+ksi=si+k for all ii from 11 to |s|−k|s|−k (|s||s| means length of string ss) and kk is the minimum positive 阅读全文
posted @ 2020-04-27 11:16
XXXSANS
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