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浅谈莫队: "https://www.cnblogs.com/AKMer/p/10374756.html" 题目传送门: "https://lydsy.com/JudgeOnline/problem.php?id=3052" 把问题搬到欧拉序上来就是裸的带修改莫队了。 每次加减某种颜色直接加减个数系 阅读全文
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浅谈莫队: "https://www.cnblogs.com/AKMer/p/10374756.html" 题目传送门: "https://lydsy.com/JudgeOnline/problem.php?id=2120" 分块做法: "https://www.cnblogs.com/AKMer/ 阅读全文
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浅谈莫队: "https://www.cnblogs.com/AKMer/p/10374756.html" 题目传送门: "https://lydsy.com/JudgeOnline/problem.php?id=3809" 用树状数组维护区间内元素个数,直接在树状数组上统计即可。 然后就$TLE$ 阅读全文
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浅谈莫队: "https://www.cnblogs.com/AKMer/p/10374756.html" 题目传送门: "https://lydsy.com/JudgeOnline/problem.php?id=3289" 用树状数组维护区间内元素的个数,动态删/加逆序对即可。 时间复杂度:$O( 阅读全文
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浅谈莫队: "https://www.cnblogs.com/AKMer/p/10374756.html" 题目传送门: "https://lydsy.com/JudgeOnline/problem.php?id=2038" 首先答案肯定是$\frac{\sum cnt_i (cnt_i 1)}{r 阅读全文