Permutations

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].

用Python递归求全排列,回顾回顾

class Permutations:
def perm(self, num, li, start, end):
s = []
if start == end:
for i in num:
s.append(i)
li.append(s)
else:
for i in range(start, end):
num[start], num[i] = num[i], num[start]
self.perm(num, li, start + 1, end)
num[start], num[i] = num[i], num[start] # @param num, a list of integer
# @return a list of lists of integers def permute(self, num):
li = []
if len(num) == 0:
return []
if len(num) == 1:
return [num]
self.perm(num, li, 0, len(num))
return li pe = Permutations()
pe.permute([3, 2, 1])

LeetCode——Permutations的更多相关文章

  1. leetcode Permutations II 无重全排列

    作者:jostree  转载请注明出处 http://www.cnblogs.com/jostree/p/4051169.html 题目链接:leetcode Permutations II 无重全排 ...

  2. [LeetCode] Permutations II 全排列之二

    Given a collection of numbers that might contain duplicates, return all possible unique permutations ...

  3. [LeetCode] Permutations 全排列

    Given a collection of numbers, return all possible permutations. For example,[1,2,3] have the follow ...

  4. [leetcode]Permutations II @ Python

    原题地址:https://oj.leetcode.com/problems/permutations-ii/ 题意: Given a collection of numbers that might ...

  5. [leetcode]Permutations @ Python

    原题地址:https://oj.leetcode.com/problems/permutations/ 题意: Given a collection of numbers, return all po ...

  6. LeetCode: Permutations 解题报告

    Permutations Given a collection of numbers, return all possible permutations. For example,[1,2,3] ha ...

  7. Leetcode Permutations

    Given a collection of numbers, return all possible permutations. For example,[1,2,3] have the follow ...

  8. [Leetcode] Permutations II

    Given a collection of numbers that might contain duplicates, return all possible unique permutations ...

  9. LeetCode:Permutations, Permutations II(求全排列)

    Permutations Given a collection of numbers, return all possible permutations. For example, [1,2,3] h ...

  10. LeetCode:Permutations(求全排列)

    Given a collection of numbers, return all possible permutations. For example,[1,2,3] have the follow ...

随机推荐

  1. migrate from weblogic to tomcat: directory mapping--reference

    Question: I am trying to migrate from weblogic to tomcat. in weblogic I have <virtual-directory-m ...

  2. git使用介绍

    Git简单介绍 参考网址: git使用简介 这个教程推荐使用:git教程 git和svn的差异 git和svn的最大差异在于git是分布式的管理方式而svn是集中式的管理方式.如果不习惯用代码管理工具 ...

  3. IDL绘制黑体辐射曲线

    普朗克定律是热红外遥感中常常使用的三大定律之一,描述了黑体辐射能量的情况.绝对黑体的辐射光谱对于研究一切物体的辐射规律具有根本的意义.1900年普朗克引进量子概念,将辐射当做不连续的量子发射,成功地从 ...

  4. ASP.NET-FineUI开发实践-13(二)

    1.加图标和事件 上次已经通过DataSimulateTreeLevelField属性控制了树节点的显示,不用看也知道就是给指定列数据前面加个图标的HTML 可以在SimulateTreeHeper类 ...

  5. Windows XP CD 函数不正确

    参考这篇文章:http://support.hp.com/cn-zh/document/c00760286 一,在设备管理中查看,如果刻录机名称中含 ROM,则需确认设备是否可写 二,若确定设备可写, ...

  6. sublime text There are no packages 解决!

    1.问题如下图 解决如下: 1.取得sublime.wbond.net的IPv4地址.在命令提示符中输入以下命令: ping sublime.wbond.net 获得  pv 4 ip     2.C ...

  7. mybatis 一对一关联

    首先建表: CREATE TABLE teacher( t_id INT PRIMARY KEY AUTO_INCREMENT, t_name VARCHAR(20) ); CREATE TABLE ...

  8. thinkphp 邮件发送

    最近项目上要求,要做个邮件发送的功能,因为用到的框架是ThinkPHP,于是就自己整理一下. 引入class.phpmailer.php,大家可以去这个链接去下载: http://pan.baidu. ...

  9. 你好,C++(35)类是如何藏私房钱的?6.2.4 拷贝构造函数

    6.2.6  类成员的访问控制 类成员包括类的成员变量和成员函数,它们分别用来描述类的属性和行为.而类成员的访问控制决定了哪些成员是公开的,可以被外界访问,也可以被自身访问:哪些成员是私有的,只能在类 ...

  10. Unique Binary Search Tree

    Given n, how many structurally unique BST's (binary search trees) that store values 1...n? For examp ...