08 2018 档案
摘要:资格赛 Problem A Problem B Problem C Problem D Problem E Problem F 初赛 A Problem A 签到题 Problem B 用deque双端队列模拟即可。 插入的时候用insert。 Problem C Problem D Problem
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摘要:Problem A Problem B Problem C Problem D Problem E 每个数的因子个数大概100个(最多128个) 那么把这些数全都放到集合里面就可以了。 然后直接上启发式合并,合并的时候求答案即可。 Problem F Problem G Problem H Prob
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摘要:Problem A Problem B Problem C Problem D Problem E Problem F Problem G Problem H Problem I Problem J Problem K
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摘要:Problem A Problem B 考虑把某条边卡在槽内,这样两个点的位置确定了,都在边上, 当这条边长度小于等于槽宽度的时候,如果剩下那个点在区域里面, 那就直接返回三角形的高。 否则用一系列公式算出三角形在槽内的高度,注意也要判断剩下的点是否在区域里面。 最后,别写错叉积…… Problem
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摘要:Problem A 比赛的时候没主要搞这个题(因为不怎么会) 其实就是类似做dij的一个过程,记录3个值:当前点编号,到当前点的代价,当前点的那条边的颜色。 然后遍历一遍就可以了。 Problem B 本来比赛的时候想到不同的字母之间的差值肯定不能作为循环节。 然后我就上了FFT,因为做过差不多的题
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摘要:Problem A Problem B Problem C Problem D Problem E Problem F Problem G Problem H Problem I Problem J Problem K Problem L
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摘要:Problem A Problem B Problem C Problem D Problem E Problem F Problem G Problem H Problem I Problem J Problem K
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摘要:Problem A Problem B Problem C Problem D Problem E Problem F Problem G Problem H Problem I Problem J Problem K Problem L
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摘要:Problem A Problem B Problem C Problem D Problem E Problem F Problem G Problem H Problem I Problem J Problem K Problem L
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摘要:Problem A Problem B Problem C Problem D Problem E Problem F Problem G Problem H Problem I Problem J Problem K Problem L
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摘要:Problem A Problem B Problem C Problem D 首先对每个点排序,相当于从左边开始扫过来。 把一条线段看成两个点,离散化之后是$cnt$个点,转化成覆盖$cnt$个点的最少花费。 设$f[i][j]$表示覆盖编号$i$到$j$的点的必须的最小花费。 转移的时候在当前区
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摘要:Problem A Problem B Problem C Problem D Problem E Problem F Problem G Problem H Problem I Problem J Problem K Problem L
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摘要:Problem A Problem B Problem C Problem D Problem E Problem F Problem G Problem H Problem I Problem J
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摘要:Problem A Problem B Problem C Problem D Problem E Problem F Problem G Problem H Problem I Problem J Problem K Problem L
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摘要:Problem A Problem B Problem C Problem D Problem E Problem F Problem G Problem H Problem I Problem J Problem K Problem L Problem M
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