Codeforces 323 C Two permutations 题解(主席树) 题目:CF 323 C. 题目大意:给定两个长度为nn的排列a,ba,b,每次询问有多少个数a[l1..r1]a[l1..r1]和b[l2..r2]b[l2..r2]中同时出现. 首先很显然我们要把bb中每一个数在aa中的出现位置记录下来. 考虑一个简化的问题,若l2=1,r2=nl2=1,r2=n,那么我们现
构造直接按上面的模拟即可。 时间复杂度O(n2)O(n2)。 code // Problem: E2. Two Permutations (Hard Version) // Contest: Codeforces - Codeforces Round 899 (Div. 2) // URL: https://codeforces.com/problemset/problem/1882/E2 // Memory Limit: 256 MB // Time Limit: 2000 ms // // Powered...
Input The first line contains two integersnandm(1 ≤ n ≤ m ≤ 200000) — the sizes of the given permutations. The second line containsndistinct integers — permutationa, the third line containsmdistinct integers — permutationb. Numbers on the lines are separated by spaces. O...
CodeForces-213E:Two Permutations(神奇的线段树+hash) Rubik is very keen on number permutations. Apermutationawith lengthnis a sequence, consisting ofndifferent numbers from 1 ton. Element numberi(1 ≤ i ≤ n) of this permutation will be denoted asai. Furik decided to make a present ...
Two permutations CodeForces - 323C http://codeforces.com/problemset/problem/323/C 主席树裸题 对于第i个版本的线段树 a[i]在b序列中什么位置出现 就在那个位置加一 #include <bits/stdc++.h> usingnamespacestd; constintmaxn=2e6+10;...
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Codeforces 213E Two Permutations 题目链接 https://codeforces.com/contest/213/problem/E 题目大意 给你一个 1 ~ N的排列 A 和一个 1 ~ M 的排列 B ( N <= M ) 问有多少个 d 可以使得排列 A 的每个数 + d 后为排列 B 的子序列 解题思路...
Codeforces 323C Two permutations 题目描述 You are given two permutations pp and qq , consisting of nn elements, and mm queries of the form: l_{1},r_{1},l_{2},r_{2}l1,r1,l2,r2 $ (l_{1}<=r_{1}; l_{2}<=r_{2}) $ . The response for the query is the...
CodeForces - 323C Two permutations DescriptionDescription传送门SolutionSolution注意到题目有个很特殊的条件:a,ba,b 都是排列。也就是说 a,ba,b 里相同的数是一一对应的。我们可以搞一个奇怪的映射:cici 表示bb 数组的第 ii 个数出现在 aa 数组的哪个位置,用主席树维护,在第 ii 位多插入一个 cici(相当于...