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京东 11.11 红包
Educational Codeforces Round 152 (Rated for Div. 2)(A-D)思路讲解
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A题:注意每次上下都是有一个面包,所以要先去掉,然后看能塞多少组,数据小,跑循环也可以通过。 B题:将所有怪兽打到一击线,然后再排序,输出顺序 C题:注意观察,要点在于把所有区间访问都变成一个可以代表该字符串的表示(扩展区间和缩小区间以及很多做法皆可) D题:dp可以写,但是贪心比较简单,注意到有数字操作数字一定是最好的,每次从左边开始,可以发现很明显的贪心。 E题:暂时没写,但是线段树会很容易t,之后补题,会更新分p。
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