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46. Permutations(java,无重复元素,字典序 + 非字典序)
题目:Given a collection of distinct numbers, return all possible permutations. 解析:本题可以有两种方法解决 方法一:1)将第一个元素依次与所有元素进行交换; 2)交换后,可看作两部分:第一个元素及其后面的元素; 3)后面的元 ...
分类:编程语言   时间:2016-08-13 12:35:52    阅读次数:150
随机打乱工具sklearn.utils.shuffle,将原有的序列打乱,返回一个全新的错乱顺序的值
Shuffle arrays or sparse matrices in a consistent way This is a convenience alias to resample(*arrays, replace=False) to do random permutations of the ...
分类:其他好文   时间:2016-08-11 21:02:34    阅读次数:2409
LeetCode 【47. 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 pe ...
分类:其他好文   时间:2016-08-11 20:46:59    阅读次数:130
[Codeforces 501D] - Misha and Permutations Summation
题意是给你两个长度为$n$的排列,他们分别是$n$的第$a$个和第$b$个全排列。输出$n$的第$\left(a+b \right)\textrm{mod} \, n!$个全排列。 一种很容易的想法是直接把$a$和$b$求出来,然后计算$\left(a+b \right)\textrm{mod} \ ...
分类:其他好文   时间:2016-08-07 23:00:27    阅读次数:227
leetCode 46. Permutations 回溯问题 | Medium
46.Permutations(全排列问题--回溯问题经典)Givenacollectionofdistinctnumbers,returnallpossiblepermutations.Forexample,[1,2,3]havethefollowingpermutations:[ [1,2,3], [1,3,2], [2,1,3], [2,3,1], [3,1,2], [3,2,1] ]题目大意:求一个序列的全排列。思路:做排列组合..
分类:其他好文   时间:2016-08-07 17:09:57    阅读次数:132
leetcode 46 Permutations ----- java
Given a collection of distinct numbers, return all possible permutations. For example,[1,2,3] have the following permutations: 给定一个数组,求所有的排列组合。 做出这道题很 ...
分类:编程语言   时间:2016-07-20 19:22:15    阅读次数:244
Permutation Index I & II
Given a permutation which contains no repeated number, find its index in all the permutations of these numbers, which are ordered in lexicographical o ...
分类:其他好文   时间:2016-07-19 09:10:07    阅读次数:323
用python写了一个智力题的答案
functools itertools m=a=[,,,,,,,,] list=(itertools.permutations(a,)) n(,functools.reduce(x,y:x*y,(,))): list2=(list[n]) b=(list2[])*+(list2[])*+(list2[]) c=(list2[])*+(list2[]) d=(list2[])*+(list2[]) e=(list2[])*+(list2[]) (b*c==d*e): m=m+(m,b,c,d,e)运行结..
分类:编程语言   时间:2016-07-15 22:03:25    阅读次数:183
47. Permutations II java solutions
Given a collection of numbers that might contain duplicates, return all possible unique permutations. For example,[1,1,2] have the following unique pe ...
分类:编程语言   时间:2016-07-15 09:40:34    阅读次数:170
60. Permutation Sequence java solutions
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 ...
分类:编程语言   时间:2016-07-15 09:24:25    阅读次数:167
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