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js| Cache | tips | show Some time ago to do their own community forum, on the basis of Jive to do a page to show all the forum posts, can be called the general version, imitate the Forum class interface to do a superforum and realize cachable, but because this page refresh volume is larger, although the cache, I still think of ways to cache the page, the feeling of using JSP generated HTML static content when caching, page access speed should be impr
Topic: https://www.luogu.org/problem/show?pid=1041 This is a good question; My first idea is greedy +dfs, each time cut the largest point of the sub-tree edge, can be updated again; But this greed is wrong, but Noip data good (hen) Heart (shui), can take 90 points; For example, the following illustration:You can see it, HH. According to this greed we will cut 2, but in this way, the number of infections is 4, (1,3,6,7);But if you cut 3, the number of infections is 2 (up); So can search, layer by
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