Description
Given a permutation a1, a2,...aN of
{1, 2,..., N}, we define its
E-value as the amount of elements where ai >
i. For example, the E-value of permutation
{1, 3, 2, 4} is 1, while th...
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其他好文 时间:
2014-08-23 16:54:31
阅读次数:
232
翻译自stackoverflow英语好的同学可以自己去看一下。什么是next permutation 下面是四个元素{1,2,3,4}的排列1 2 3 41 2 4 31 3 2 41 3 4 21 4 2 31 4 3 22 1 3 4... 每一行都是一个排列。 我们如何从一个排列转到下一...
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其他好文 时间:
2014-08-21 17:01:44
阅读次数:
228
Implement next permutation, which rearranges numbers into the lexicographically next greater permutation of numbers.If such arrangement is not possibl...
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其他好文 时间:
2014-08-20 14:06:22
阅读次数:
163
Description
FJ and his cows enjoy playing a mental game. They write down the numbers from 1 to N (1 <= N <= 10) in a certain order and then sum adjacent numbers to produce a new list with one fewer...
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其他好文 时间:
2014-08-20 10:33:36
阅读次数:
256
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 (ie, for n = 3):
"123""132""213""231""3...
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其他好文 时间:
2014-08-19 22:34:25
阅读次数:
288
1A! This is actually a basic question in Combinatorics: if at digit[k] = n, it contributes (k-1)! * n to the targeted index.class Solution {public: .....
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其他好文 时间:
2014-08-19 14:22:04
阅读次数:
169
Implement next permutation, which rearranges numbers into the lexicographically next greater permutation of numbers.If such arrangement is not possibl...
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其他好文 时间:
2014-08-19 00:57:53
阅读次数:
213
过程:从右往左,找到第一个A[i] A[i], j > i;交换A[i] 与 A[j];将A[j+1]之后的元素逆序。代码: 1 class Solution { 2 public: 3 void nextPermutation(vector &num) { 4 if(nu...
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其他好文 时间:
2014-08-19 00:48:53
阅读次数:
248
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...
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其他好文 时间:
2014-08-18 23:29:23
阅读次数:
207
今天围观刘汝佳神犇的白书发现了一个好用的函数:next_permutation();可以用于可重, 或者不可重集, 寻找下一个排列.时间复杂度尚不明.//适用于不可重和可重集的排列.# include # include using namespace std;int a[1003], n;int ...
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编程语言 时间:
2014-08-15 17:21:09
阅读次数:
222