46. Permutations——本质和树DFS遍历无异 fun: for i in nums fun(i)

【46. Permutations——本质和树DFS遍历无异 fun: for i in nums fun(i)】的更多相关文章

46. Permutations——本质和树DFS遍历无异 fun: for i in nums fun(i)

Given a collection of distinct 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], [3,2,1] ] class Solution(object): def permute(self, nums): """ :t…

PAT Advanced 1106 Lowest Price in Supply Chain (25) [DFS，BFS，树的遍历]

题目 A supply chain is a network of retailers(零售商), distributors(经销商), and suppliers(供应商)– everyone involved in moving a product from supplier to customer. Starting from one root supplier, everyone on the chain buys products from one's supplier in a pr…

PAT Advanced 1094 The Largest Generation (25) [BFS，DFS，树的遍历]

题目 A family hierarchy is usually presented by a pedigree tree where all the nodes on the same level belong to the same generation. Your task is to find the generation with the largest population. Input Specification: Each input file contains one test…

刷题46. Permutations

一.题目说明题目是46. Permutations,给一组各不相同的数,求其所有的排列组合.难度是Medium 二.我的解答这个题目,前面遇到过类似的.回溯法(树的深度优先算法),或者根据如下求解: 刷题31. Next Permutation 我考虑可以用dp做,写了一个上午,理论我就不说了,自己看代码: #include<iostream> #include<vector> #include<unordered_map> using namespace std;…

图之BFS和DFS遍历的实现并解决一次旅游中发现的问题

这篇文章用来复习使用BFS(Breadth First Search)和DFS(Depth First Search) 并解决一个在旅游时遇到的问题. 关于图的邻接表存储与邻接矩阵的存储,各有优缺点.但是邻接矩阵继承了数组的优点--在索引方面速度相比链表要快的多.由于以前我实现过邻接矩阵的存储方式,这次就用邻接表的方式复习吧. 图的邻接表存储简单示意 0.前提类中的api以及属性 class CGraph { public: CGraph(void); ~CGraph(void); // 根据…

ZOJ3761（并查集+树的遍历)

Easy billiards Time Limit: 2 Seconds Memory Limit: 65536 KB Special Judge Edward think a game of billiards is too long and boring. So he invented a new game called Easy billiards. Easy billiards has N balls on a brimless rectangular table i…

[Leetcode][Python]46: Permutations

# -*- coding: utf8 -*-'''__author__ = 'dabay.wang@gmail.com' 46: Permutationshttps://leetcode.com/problems/permutations/ Given a collection of numbers, return all possible permutations.For example,[1,2,3] have the following permutations:[1,2,3], [1,3…