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LeetCode——Permutations II
Given a collection of numbers that might contain duplicates, return all possible unique permutations. For example, [1,1,2] have the following unique permutations: [1,1,2], [1,2,1], and [2,1,1]....
分类:其他好文   时间:2014-09-01 14:05:28    阅读次数:290
CF 463D Gargari and Permutations [dp]
给出一个长为n的数列的k个排列(1?≤?n?≤?1000; 2?≤?k?≤?5),求这个k个数列的最长公共子序列的长度 dp[i]=max{dp[j]+1,where j #include #include #include #include #include #include #include using namespace std; #define pb push_back ...
分类:其他好文   时间:2014-09-01 14:04:23    阅读次数:192
UVA - 11077 Find the Permutations (置换)
Sorting is one of the most usedoperations in real life, where Computer Science comes into act. It iswell-known that the lower bound of swap based sorting is nlog(n).It means that the best possible sor...
分类:其他好文   时间:2014-09-01 10:50:23    阅读次数:234
Codeforces #264 (Div. 2) D. Gargari and Permutations
Gargari got bored to play with the bishops and now, after solving the problem about them, he is trying to do math homework. In a math book he have found k permutations. Each of them consists of numbe...
分类:其他好文   时间:2014-09-01 00:28:22    阅读次数:328
Codeforces 463D. Gargari and Permutations【DP】
题目大意: 给出1~n的k个排列(2 做法: 算是不难的DP,dp[i]表示以i为结尾的最长公共子序列的长度,由于每个数在一个排列中只可能出现一次,我们用一个二维数组pos[i][j]表示数字j在第i行出现在第几个位置,再用一个数组cnt[i] 记录i出现了多少次;当第i个数出现了k次之后,说明能够以该数为结尾构成公共子序列,那么dp[i]=max(dp[j]+1),其中i,j满足p...
分类:其他好文   时间:2014-08-31 17:22:21    阅读次数:617
codeforces Gargari and Permutations(DAG+BFS)
1 /* 2 题意:求出多个全排列的lcs! 3 思路:因为是全排列,所以每一行的每一个数字都不会重复,所以如果有每一个全排列的数字 i 都在数字 j的前面,那么i, j建立一条有向边! 4 最后用bfs遍历整个图,求出源点到每一个点的距离,其中最大的距离就是最长的...
分类:其他好文   时间:2014-08-31 10:29:11    阅读次数:213
Leetcode--Permutation Sequence
Problem Description: 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 sequence (ie, for n = 3):...
分类:其他好文   时间:2014-08-30 17:49:39    阅读次数:171
python一中实现组合的方式
方式1:#!/usr/bin/env python#-*- encoding: utf-8 -*-def permutations(iterable, r=None): # permutations('ABCD', 2) --> AB AC AD BA BC BD CA CB CD DA DB DC...
分类:编程语言   时间:2014-08-30 09:54:29    阅读次数:328
Permutations Permutations||
全排列在leetcode Permutations Permutations|| 两道题目上的实现。...
分类:其他好文   时间:2014-08-29 13:08:38    阅读次数:110
LeetCode 59 Permutation Sequence
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 sequence (ie, for n = 3): "123""132""213""231""3...
分类:其他好文   时间:2014-08-28 21:15:29    阅读次数:232
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