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Leetcode#47 Permutations II
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....
分类:其他好文   时间:2015-01-24 14:28:30    阅读次数:158
【leetcode】Permutations II (middle)
Given a collection of numbers that might contain duplicates, return all possible unique permutations.For example,[1,1,2]have the following unique perm...
分类:其他好文   时间:2015-01-21 22:16:01    阅读次数:290
[C++]LeetCode: 114 Permutation Sequence(返回第k个阶乘序列——寻找数学规律)
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"...
分类:编程语言   时间:2015-01-20 22:19:05    阅读次数:209
Permutations
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,...
分类:其他好文   时间:2015-01-20 22:00:51    阅读次数:127
Permutation Sequence
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...
分类:其他好文   时间:2015-01-20 17:47:21    阅读次数:135
Permutations
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...
分类:其他好文   时间:2015-01-20 13:51:03    阅读次数:247
[LeetCode]47.Permutations II
【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...
分类:其他好文   时间:2015-01-19 12:49:17    阅读次数:133
[LeetCode]46.Permutations
【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】 ...
分类:其他好文   时间:2015-01-16 19:16:55    阅读次数:170
501D Misha and Permutations Summation 数据结构+打脸题
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...
分类:其他好文   时间:2015-01-15 18:18:59    阅读次数:314
LeetCode: Permutation Sequence 解题报告
PermutationSequence https://oj.leetcode.com/problems/permutation-sequence/The set [1,2,3,…,n] contains a total of n! unique permutations.By listing a....
分类:其他好文   时间:2015-01-14 19:50:23    阅读次数:136
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