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codeforces A. Slightly Decreasing Permutations 题解
Permutation p is an ordered set of integers p1,??p2,??...,??pn, consisting of n distinct positive integers, each of them doesn't exceed n. We'll denote the i-th element of permutation p as pi. ...
分类:其他好文   时间:2014-07-22 23:00:15    阅读次数:312
【LeetCode】Longest Consecutive Sequence
Given an unsorted array of integers, find the length of the longest consecutive elements sequence.For example,Given[100, 4, 200, 1, 3, 2],The longest ...
分类:其他好文   时间:2014-05-10 20:06:26    阅读次数:404
HDU 4718 The LCIS on the Tree(树链剖分)
Problem DescriptionFor a sequence S1, S2, ... , SN, and a pair of integers (i, j), if 1 2 #include 3 #include 4 #include 5 using namespace std...
分类:其他好文   时间:2014-05-05 23:50:08    阅读次数:445
Leetcode | Longest Consecutive Sequence
Given an unsorted array of integers, find the length of the longest consecutive elements sequence.For example,Given [100, 4, 200, 1, 3, 2],The longest...
分类:其他好文   时间:2014-05-05 23:01:41    阅读次数:374
【LeetCode OJ】Longest Consecutive Sequence
Problem Link:http://oj.leetcode.com/problems/longest-consecutive-sequence/This problem is a classical problem where we can reduce the running time by ...
分类:其他好文   时间:2014-05-05 22:55:22    阅读次数:552
Next Permutation
Implement next permutation, which rearranges numbers into the lexicographically next greater permutation of numbers.If such arrangement is not possibl...
分类:其他好文   时间:2014-05-05 22:19:17    阅读次数:312
Leetcode permutation 系列
关于permutation的讲解,请参见http://blog.csdn.net/xuqingict/article/details/24840183 下列题目的讲解均是基于上面的文章: 题1:  Next Permutation  Total Accepted: 8066 Total Submissions: 32493My Submissions ...
分类:其他好文   时间:2014-05-04 00:01:36    阅读次数:343
[转]Installing python 2.7 on centos 6.3. Follow this sequence exactly for centos machine only
Okay for centos 6.4 also On apu.0xdata.loc, after this install was done$ which python /usr/local/bin/python$ python -VPython 2.7.3$ ls -ltr /usr/local...
分类:编程语言   时间:2014-05-02 12:53:59    阅读次数:609
C++ 标准库 permutation
首先,permutation指的是对元素的重排,比如a , b , c 三个元素的所有的重排为    abc, acb, bac,bca,cab,cba 总共 3!  = 6 中情况,但是如何声称这六种情况呢,C++标准库定义了函数 next_permutation,来生成一组元素的所有的全排列。 首先,了解该函数的声明以及实现: 函数声明为: [摘自 www.cplusplus.com]...
分类:编程语言   时间:2014-05-01 18:31:34    阅读次数:268
HDU 3415 Max Sum of Max-K-sub-sequence 最长K子段和
链接:http://acm.hdu.edu.cn/showproblem.php?pid=3415 题意:给出一个数环,要找出其中9长度小于等于K的和最大的子段。 思路:不能采用最暴力的枚举,题目的数据量是10^5,O(N^2)的枚举回去超时,本题采用的很巧妙的DP做法,是用单调队列优化的DP。 运用的是STL的deque,从i:1~a找到以其中以i为尾的符合条件的子段,并将i本身放入双向队...
分类:其他好文   时间:2014-05-01 08:32:53    阅读次数:324
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