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LeetCode-60-Permuataion Sequence
算法描述: The set [1,2,3,...,n] contains a total of n! unique permutations. By listing and labeling all of the permutations in order, we get the following ...
分类:其他好文   时间:2019-01-30 15:50:54    阅读次数:99
All Permutations I - Medium
Given a string with no duplicate characters, return a list with all permutations of the characters. Examples Set = “abc”, all permutations are [“abc”, ...
分类:其他好文   时间:2019-01-19 16:25:31    阅读次数:211
46. Permutations
Given a collection of distinct integers, return all possible permutations. Example: ...
分类:其他好文   时间:2019-01-11 17:08:54    阅读次数:157
Record of coding:Codeforces 1093E
E. Intersection of Permutations You are given two permutations a and b, both consisting of n elements. Permutation of nn elements is such a integer se ...
分类:其他好文   时间:2019-01-07 17:24:56    阅读次数:157
Cideforces 1093E Intersection of Permutations (CDQ分治+树状数组)
恢复内容开始 题意:给你两个数组a和b,a,b都是一个n的全排列;有两种操作:一种是询问区间在数组a的区间[l1,r1]和数组b的区间[l2,r2]出现了多少相同的数字,另一种是交换数组b中x位置和y位置的数字。 思路:我们可以建立数组b对数组a的映射mp,mp[x]表示数组b中x位置的数在数组a中 ...
分类:编程语言   时间:2018-12-22 13:49:06    阅读次数:195
【cdq分治】【CF1093E】 Intersection of Permutations
"传送门" ~~果然前两天写完 那个题的题解以后博客就开始咕咕咕了……~~ Description 给定整数 $n$ 和两个 $1~\sim~n$ 的排列 $A,B$。 $m$ 个操作,操作有两种: $1~,~l1~,~r1~,~l2~,~r2$ 求$(\bigcup_{i=l1}^{r1} A_i ...
分类:其他好文   时间:2018-12-21 21:21:23    阅读次数:218
CodeForces - 285E: Positions in Permutations(DP+组合数+容斥)
Permutation p is an ordered set of integers p1, p2, ..., pn, consisting of n distinct positive integers, each of them doesn't exceed n. We'll denote t ...
分类:其他好文   时间:2018-12-20 18:46:23    阅读次数:178
CF1093:E. Intersection of Permutations(树状数组套主席树)
题意:给定长度为N的a数组,和b数组,a和b都是1到N的排列; 有两种操作,一种是询问[L1,R1],[L2,R2];即问a数组的[L1,R1]区间和b数组的[L2,R2]区间出现了多少个相同的数字。 一种是修改b数组两个位置的值。 思路:如果把b数组每个数取对应a数组对应数的位置,即按照b的下标建 ...
分类:编程语言   时间:2018-12-16 14:33:50    阅读次数:376
#Leetcode# 60. Permutation Sequence
https://leetcode.com/problems/permutation-sequence/ The set [1,2,3,...,n] contains a total of n! unique permutations. By listing and labeling all of t ...
分类:其他好文   时间:2018-11-24 20:57:57    阅读次数:154
#Leetcode# 47. Permutations II
https://leetcode.com/problems/permutations-ii/ Given a collection of numbers that might contain duplicates, return all possible unique permutations. E ...
分类:其他好文   时间:2018-11-23 20:47:26    阅读次数:156
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