并查集判断连通,欧拉回路判断是否成链,看网上很多地方都写得很清楚我就不再说什么是欧拉回路了
注意首尾的判断一定要用入度与出度的差等于1来判断,而不能用认为入度为0,出度为1的时首,入度为1,出度为0的是尾。
给一组数据
1
3
aba
a
ab
Ordering is possible.
#include
#define maxn 27+5
using namespace std...
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其他好文 时间:
2015-05-08 09:39:54
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140
【题目】
Given a digit string, return all possible letter combinations that the number could represent.
A mapping of digit to letters (just like on the telephone buttons) is given below....
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其他好文 时间:
2015-05-08 09:29:30
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121
Given two integers n and k, return all possible combinations of k numbers out of 1 ... n.For example,If n = 4 and k = 2, a solution is:[ [2,4], [3,4.....
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其他好文 时间:
2015-05-08 01:36:44
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90
Given a collection of integers that might contain duplicates,nums, return all possible subsets.Note:Elements in a subset must be in non-descending ord...
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其他好文 时间:
2015-05-07 20:11:21
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96
Title:Given a string containing only digits, restore it by returning all possible valid IP address combinations.For example:Given"25525511135",return[...
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其他好文 时间:
2015-05-07 16:25:11
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92
Problem:
Implement atoi to convert a string to an integer.
Hint: Carefully consider all possible input cases. If you want a challenge, please do not see below and ask yourself what are the pos...
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编程语言 时间:
2015-05-07 12:35:08
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181
By:Rand Fishkin原文链接:https://moz.com/blog/15-seo-best-practices-for-structuring-urls#1: Whenever possible, use a single domain & subdomain1.尽量使用简单的域名/二...
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Web程序 时间:
2015-05-06 14:55:37
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161
Represent nil with NSNullIt’s not possible to add nil to the collection classes described in this section because nil in Objective-C means “no object....
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其他好文 时间:
2015-05-06 14:46:39
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111
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,...
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其他好文 时间:
2015-05-06 12:35:08
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131
题目:Implementatoito convert a string to an integer.Hint:Carefully consider all possible input cases. If you want a challenge, please do not see below a...
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其他好文 时间:
2015-05-05 21:33:48
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193