原题地址字典序模拟问题,枚举num的所有字典序。假设已知序列seq,求下一个字典序序列:1. 从序列seq右侧向左寻找第一个顺序对,即对于位置i,有seq[i] seq[i]。肯定能找到这样一个j,因为j至少可以是i+13. 交换seq[i]和seq[j]4. 将seq在位置i之后的部分倒置,即将....
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其他好文 时间:
2015-01-24 14:28:30
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158
Given a collection of numbers that might contain duplicates, return all possible unique permutations.For example,[1,1,2]have the following unique perm...
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其他好文 时间:
2015-01-21 22:16:01
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290
题目:
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"...
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编程语言 时间:
2015-01-20 22:19:05
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209
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:
2015-01-20 22:00:51
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127
The set[1,2,3,…,n]contains a total ofn! unique permutations.By listing and labeling all of the permutations in order,We get the following sequence (ie...
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其他好文 时间:
2015-01-20 17:47:21
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135
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].
C++:
class S...
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其他好文 时间:
2015-01-20 13:51:03
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247
【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 permutations:
[1,1,2], [1,2,1],
an...
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其他好文 时间:
2015-01-19 12:49:17
阅读次数:
133
【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], [2,3,1], [3,1,2],
and [3,2,1].
【分析】
...
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其他好文 时间:
2015-01-16 19:16:55
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170
都快退役啦,小白书上的例题还不会。
给出一个序列S,则S的字典序为 sigma(dp[i] * (n-i)!) (1
对于两个序列A,B,(ord(A) + ord(B))%n!可以转化成 sigma( (A_dp[i] + B_dp[i] + (A_dp[i+1]+B_dp[i+1])/(n-i+1))%(n-i+1) )( 1
解码部分和编码部分为逆操作,详见代码。
#inc...
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其他好文 时间:
2015-01-15 18:18:59
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314
PermutationSequence https://oj.leetcode.com/problems/permutation-sequence/The set [1,2,3,…,n] contains a total of n! unique permutations.By listing a....
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其他好文 时间:
2015-01-14 19:50:23
阅读次数:
136