题目链接:uva 11077 - Find the Permutations
题目大意:给定一个1~n的排序,可以通过一系列的交换变成1,2,…,n,
给定n和k,统计有多少个排列至少需要交换k次才能变成有序的序列。
解题思路:给定一个序列P,可以将该序列看做是一个置换,从有序序列,开始,需要多少次回到有序序列。将P的循环分解,循环长度为1的需要0次,长度为2的需要1次,循环长度为...
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其他好文 时间:
2014-08-13 13:11:16
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275
Given a collection of numbers that might contain duplicates, return all possible unique permutations.For example, [1,1,2] have the following unique pe...
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其他好文 时间:
2014-08-12 10:17:03
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142
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...
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其他好文 时间:
2014-08-11 17:49:32
阅读次数:
201
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].
原题链接:https://oj...
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其他好文 时间:
2014-08-10 10:25:50
阅读次数:
265
题目:Given a collection of numbers that might contain duplicates, return all possible unique permutations.For example,[1,1,2] have the following unique....
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编程语言 时间:
2014-08-08 01:54:55
阅读次数:
292
问题:全排列class Solution {public: void dfs(vector &num,vector &vec2,vector >&vec1,int step,int vis[]) { if(step==num.size()) { ...
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其他好文 时间:
2014-08-06 22:25:02
阅读次数:
193
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,....
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编程语言 时间:
2014-08-03 10:09:25
阅读次数:
193
Lexicographicallyalgorithms:1. Iterate array from back to front, and find the first decreasing point: 1,2,4,3 -- 42. Iterate array from back to front,...
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其他好文 时间:
2014-08-02 05:11:02
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199
Problem DescriptionPermutation plays a very important role in Combinatorics. For example ,1 2 3 4 5 and 1 3 5 4 2 are both 5-permutations. As everyone...
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其他好文 时间:
2014-07-26 14:15:48
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237
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,...
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其他好文 时间:
2014-07-26 01:38:56
阅读次数:
214