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求数组的全排列
题目:https://leetcode.com/problems/permutations/题目要求是求一个数组的全排列,试过很多非递归的方法都不成功,感觉这题有递归会方便很多。解题思路是这样的,从数组中选出一个数,然后对数组中剩下的数进行全排列;维持一个result集合,里面存的是已经完成全排列的...
分类:编程语言   时间:2015-07-29 15:27:31    阅读次数:122
【LeetCode-面试算法经典-Java实现】【046-Permutations(求排列)】
【046-Permutations(求排列)】【LeetCode-面试算法经典-Java实现】【所有题目目录索引】原题  Given a collection of numbers, return all possible permutations.   For example,   [1,2,3] have the following permutations:   [1,2,3], [1,...
分类:编程语言   时间:2015-07-28 06:43:13    阅读次数:129
ural 1024 PERMUTATIONS
这题跟前面的一个codeforces很像,,,,就是一个数一直映射,,,让式子回到原来,,,,,,的周期 先是纯模拟,,错了几回然后TLE: #include #include using namespace std; int t=0; int a[1001],b[1001],c[1001]; int m; int fuhe() {     int i;     for(i...
分类:其他好文   时间:2015-07-27 15:02:31    阅读次数:97
[leetcode]Permutation Sequence
问题叙述性说明: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 se...
分类:其他好文   时间:2015-07-19 19:21:30    阅读次数:88
one recursive approach to solve hdu 1016, list all permutations, solve N-Queens puzzle.
one recursive approach to solve hdu 1016, list all permutations, solve N-Queens puzzle. reference: the video of stanford cs106b lecture 10 by Julie Zelenski https://www.youtube.com/watch?v=NdF1QDTRkck...
分类:移动开发   时间:2015-07-19 18:07:58    阅读次数:176
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:2015-07-17 22:50:50    阅读次数:123
090 Subsets 2
090 Subsets 2这道题就是要考虑重复的状况和 permutations 2 一样的排除重复可能的组合就是在当前位置,如果选择的值和前面那个值一样 则跳过不进行选择第二次class Solution: # @param {integer[]} nums # @return {in...
分类:其他好文   时间:2015-07-16 16:21:34    阅读次数:124
leetCode 60.Permutation Sequence (排列序列) 解题思路和方法
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:2015-07-15 15:06:59    阅读次数:199
Project Euler:Problem 62 Cubic permutations
The cube, 41063625 (3453), can be permuted to produce two other cubes: 56623104 (3843) and 66430125 (4053). In fact, 41063625 is the smallest cube which has exactly three permutations of its digits ...
分类:其他好文   时间:2015-07-14 18:21:53    阅读次数:113
[LeetCode][Java] 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]. 题意: 给...
分类:编程语言   时间:2015-07-14 13:46:05    阅读次数:380
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