题目:Given a collection of distinct numbers, return all possible permutations. 解析:本题可以有两种方法解决 方法一:1)将第一个元素依次与所有元素进行交换; 2)交换后,可看作两部分:第一个元素及其后面的元素; 3)后面的元 ...
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编程语言 时间:
2016-08-13 12:35:52
阅读次数:
150
Shuffle arrays or sparse matrices in a consistent way This is a convenience alias to resample(*arrays, replace=False) to do random permutations of the ...
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其他好文 时间:
2016-08-11 21:02:34
阅读次数:
2409
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:
2016-08-11 20:46:59
阅读次数:
130
题意是给你两个长度为$n$的排列,他们分别是$n$的第$a$个和第$b$个全排列。输出$n$的第$\left(a+b \right)\textrm{mod} \, n!$个全排列。 一种很容易的想法是直接把$a$和$b$求出来,然后计算$\left(a+b \right)\textrm{mod} \ ...
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其他好文 时间:
2016-08-07 23:00:27
阅读次数:
227
46.Permutations(全排列问题--回溯问题经典)Givenacollectionofdistinctnumbers,returnallpossiblepermutations.Forexample,[1,2,3]havethefollowingpermutations:[
[1,2,3],
[1,3,2],
[2,1,3],
[2,3,1],
[3,1,2],
[3,2,1]
]题目大意:求一个序列的全排列。思路:做排列组合..
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其他好文 时间:
2016-08-07 17:09:57
阅读次数:
132
Given a collection of distinct numbers, return all possible permutations. For example,[1,2,3] have the following permutations: 给定一个数组,求所有的排列组合。 做出这道题很 ...
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编程语言 时间:
2016-07-20 19:22:15
阅读次数:
244
Given a permutation which contains no repeated number, find its index in all the permutations of these numbers, which are ordered in lexicographical o ...
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其他好文 时间:
2016-07-19 09:10:07
阅读次数:
323
functools
itertools
m=a=[,,,,,,,,]
list=(itertools.permutations(a,))
n(,functools.reduce(x,y:x*y,(,))):
list2=(list[n])
b=(list2[])*+(list2[])*+(list2[])
c=(list2[])*+(list2[])
d=(list2[])*+(list2[])
e=(list2[])*+(list2[])
(b*c==d*e):
m=m+(m,b,c,d,e)运行结..
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编程语言 时间:
2016-07-15 22:03:25
阅读次数:
183
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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编程语言 时间:
2016-07-15 09:40:34
阅读次数:
170
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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编程语言 时间:
2016-07-15 09:24:25
阅读次数:
167