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Permutations(Leet Code)
Given a collection of numbers, return all possible permutations. For example, [1,2,3] have the following permutations: [1,2,3], [1,3,2], [2,1,3], [2,3,1], [3,1,2], and [3,2,1]....
分类:其他好文   时间:2015-04-21 20:45:08    阅读次数:136
Permutations
/* 题意:给一个集合,求所有的排列 做法:*/class Solution {public: vector >res;int count ; void dfs(int A[],vectornum,int n,int cur){ if(cur == n){//找...
分类:其他好文   时间:2015-04-20 20:48:31    阅读次数:168
LeetCode 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""312""321"Give...
分类:其他好文   时间:2015-04-20 15:00:36    阅读次数:116
Leetcode: Permutations II
题目: 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]. 这...
分类:其他好文   时间:2015-04-19 21:29:02    阅读次数:129
川大邀请赛
4423:Necklace一道计数问题,当时不会敲,先留着4424:Permutations签到题 1 /***Good Luck***/ 2 #define _CRT_SECURE_NO_WARNINGS 3 #include 4 #include 5 #include 6 #include...
分类:其他好文   时间:2015-04-19 01:01:56    阅读次数:177
Leetcode: Permutations
题目: Given a collection of numbers, return all possible permutations.For example, [1,2,3] have the following permutations: [1,2,3], [1,3,2], [2,1,3], [2,3,1], [3,1,2], and [3,2,1]. 思路分析: 思路一: 最容易想到...
分类:其他好文   时间:2015-04-18 22:06:57    阅读次数:162
Leetcode Permutations
题目地址:https://leetcode.com/problems/permutations/题目分析:很明显可以使用递归,先将起始位置与后面的每个数字交换位置,然后将起始位置往后移以为,以该起始位置为起点求排列,依次类推即可使用递归法。题目解答:import java.util.ArrayLis...
分类:其他好文   时间:2015-04-15 13:24:58    阅读次数:103
Permutation Sequence
The set[1,2,3,…,n]contains a total ofn! unique permutations.By listing and labeling all of the permutations in order,We get the following sequence (ie...
分类:其他好文   时间:2015-04-12 13:11:26    阅读次数:118
Codeforces Round #177 (Div. 2)---E. Polo the Penguin and XOR operation(贪心)
Little penguin Polo likes permutations. But most of all he likes permutations of integers from 0 to n, inclusive.For permutation p?=?p0,?p1,?…,?pn, Polo has defined its beauty — number .Expression mean...
分类:其他好文   时间:2015-04-08 18:08:05    阅读次数:144
[LeetCode] Permutations 排列生成算法之字典序法
字典序排序生成算法 字典序法就是按照字典排序的思想逐一产生所有排列。 例如,由1,2,3,4组成的所有排列,从小到大的依次为: 1234, 1243, 1324, 1342, 1423, 1432,  2134, 2143, 2314, 2341, 2413, 2431,  3124, 3142, 3214, 3241, 3412, 3421,  4123, 4132,...
分类:编程语言   时间:2015-04-08 18:03:57    阅读次数:250
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