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SD6.22集训总结
2022-06-29 17:59:00 【Flame*】
zzzzz
不懂了 我感觉自己最近的睡眠很多啊 但就是天天犯困天天犯困天天犯困
是不是有一点低血糖)
发现一个规律 自己奇数天正常 偶数天挂分
今天也在SD省队队线内捏)
今天晚上做了一个很想做的事 把二次离线莫队复习了
时间安排
8.00-10.00
看题 疯狂思索T1 有点犯困 很快就会75了 猛想正解 但是一直没啥想法,我那个东西如果数据精心构造 很容易卡到n^2log
然后看了看T2 也想了想大于暴力的分数
10.00-11.00
打了T1 惊喜的发现三个样例都能过 感觉会不会数据偏水
11.00-12.00
又思考了一会T2之后 还是打了暴力粗滚了(中间还迷了一会想有没有可能是柯西计数法)
12.00-12.30
思考了一会T3 本来想着是个n^2/bitset 但是猛的反应过来 M是1.8e8 随便写都是对的)
然后还是加了个贪心 妄图多冲一点
题目分析
T1
不懂 但是我会线段树 考虑从叶子上传每个操作 按照时间往上合并 如果一个点被多个操作更新 可以把操作合并
然后树剖查询
T2
不懂 但是可以 n 2 n^2 n2 预处理 + n n n 查询
感觉是不是平衡一下复杂度做个 n n n\sqrt n nn
T3
不懂 乱贪心一下吧
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