[codeforces724D]Dense Subsequence 试题描述 You are given a string s, consisting of lowercase English letters, and the integer m. One should choose some symbols from the given string so that any contiguous subsegment of length m has at least one selected…

D. Dense Subsequence time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output You are given a string s, consisting of lowercase English letters, and the integer m. One should choose some symbols fr…

传送门:D Dense Subsequence 题意:输入一个m,然后输入一个字符串,从字符串中取出一些字符组成一个串,要求满足:在任意长度为m的区间内都至少有一个字符被取到,找出所有可能性中字典序最小的情况,并按字典序输出 思路:字典序 例如 aaaaaaab < ab  也就是说,如果满足要求的取法中取到了b 那么所有的a都应该被取到,这样才可以保证字典序最小,那么也就是说在26个字母中找到一定要被取的最大字母,然后再确定最大的字母的个数,比它小的全部要取 AC代码: #include &quo…

Dense Subsequence time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output You are given a string s, consisting of lowercase English letters, and the integer m. One should choose some symbols from…

D. Dense Subsequence 题目连接: http://codeforces.com/contest/724/problem/D Description You are given a string s, consisting of lowercase English letters, and the integer m. One should choose some symbols from the given string so that any contiguous subse…

D. Dense Subsequence time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output You are given a string s, consisting of lowercase English letters, and the integer m. One should choose some symbols fr…

time limit per test2 seconds memory limit per test256 megabytes inputstandard input outputstandard output You are given a string s, consisting of lowercase English letters, and the integer m. One should choose some symbols from the given string so th…

time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output You are given a string s, consisting of lowercase English letters, and the integer m. One should choose some symbols from the given string s…

1. Intel Code Challenge Final Round (Div. 1 + Div. 2, Combined) B. Batch Sort    暴力枚举,水 1.题意:n*m的数组,每行最多可交换1次,列最多可交换两列,问最终是否可以变换到每行都是1~m. 2.总结:暴力即可. #include<bits/stdc++.h> #define F(i,a,b) for (int i=a;i<b;i++) #define FF(i,a,b) for (int i=a;i&l…

题目链接: http://codeforces.com/contest/724 A. Checking the Calendar time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output You are given names of two days of the week. Please, determine whether it is…

每一个实数都能用有理数去逼近到任意精确的程度,这就是有理数的稠密性.The rational points are dense on the number axis.…

A sequence of numbers is called arithmetic if it consists of at least three elements and if the difference between any two consecutive elements is the same. For example, these are arithmetic sequences: 1, 3, 5, 7, 9 7, 7, 7, 7 3, -1, -5, -9 The follo…

Given a string s and a string t, check if s is subsequence of t. You may assume that there is only lower case English letters in both s and t. t is potentially a very long (length ~= 500,000) string, and s is a short string (<=100). A subsequence of…

A sequence of numbers is called a wiggle sequence if the differences between successive numbers strictly alternate between positive and negative. The first difference (if one exists) may be either positive or negative. A sequence with fewer than two…

Given an unsorted array return whether an increasing subsequence of length 3 exists or not in the array. Formally the function should: Return true if there exists i, j, k such that arr[i] < arr[j] < arr[k] given 0 ≤ i < j < k ≤ n-1 else return…

Given an unsorted array of integers, find the length of longest increasing subsequence. For example, Given [10, 9, 2, 5, 3, 7, 101, 18], The longest increasing subsequence is [2, 3, 7, 101], therefore the length is 4. Note that there may be more than…

1. 问题描述 子串应该比较好理解,至于什么是子序列,这里给出一个例子:有两个母串 cnblogs belong 比如序列bo, bg, lg在母串cnblogs与belong中都出现过并且出现顺序与母串保持一致,我们将其称为公共子序列.最长公共子序列(Longest Common Subsequence, LCS),顾名思义,是指在所有的子序列中最长的那一个.子串是要求更严格的一种子序列,要求在母串中连续地出现.在上述例子的中,最长公共子序列为blog(cnblogs, belong),最长公…

1. Description Given an unsorted array return whether an increasing subsequence of length 3 exists or not in the array. Formally the function should: Return true if there exists i, j, k such that arr[i] < arr[j] < arr[k] given 0 ≤ i < j < k ≤…

UVA - 11404 Palindromic Subsequence 题意:一个字符串,删去0个或多个字符,输出字典序最小且最长的回文字符串 不要求路径区间DP都可以做 然而要字典序最小 倒过来求LCS,转移同时维护f[i][j].s为当前状态字典序最小最优解 f[n][n].s的前半部分一定是回文串的前半部分(想想就行了) 当s的长度为奇时要多输出一个(因为这样长度+1,并且字典序保证最小(如axyzb  bzyxa,就是axb|||不全是回文串的原因是后半部分的字典序回文串可能不是最小,多…

Longest Increasing Subsequence(LIS) 一个美丽的名字 非常经典的线性结构dp [朴素]:O(n^2) d(i)=max{0,d(j) :j<i&&a[j]<a[i]}+1 直接两个for [二分查找优化]:O(n^2) g(i):d值为i的最小的a  每次更新然后lower_bound即可 ［大于等于］ lower_boundReturn iterator to lower bound Returns an iterator pointing…

Given a sequence of integers, find the longest increasing subsequence (LIS). You code should return the length of the LIS. Have you met this question in a real interview?     Example For [5, 4, 1, 2, 3], the LIS  is [1, 2, 3], return 3 For [4, 2, 4,…

Given a sequence of integers, find the longest increasing subsequence (LIS). You code should return the length of the LIS. Example For [5, 4, 1, 2, 3], the LIS  is [1, 2, 3], return 3 For [4, 2, 4, 5, 3, 7], the LIS is [4, 4, 5, 7], return 4 Challeng…

这里做了一些小的修改,感谢谷歌rd的帮助,使得能够统一处理dense的数据,或者类似文本分类这样sparse的输入数据.后续会做进一步学习优化,比如如何多线程处理. 具体如何处理sparse 主要是使用embedding_lookup_sparse,参考 https://github.com/tensorflow/tensorflow/issues/342 两个文件 melt.py binary_classification.py 代码和数据已经上传到 https://github.com/ch…

原题链接在这里:http://www.lintcode.com/en/problem/longest-common-subsequence/ 题目: Given two strings, find the longest common subsequence (LCS). Your code should return the length of LCS. Clarification What's the definition of Longest Common Subsequence? htt…

Given a sequence of K integers { N1, N2, ..., NK }. A continuous subsequence is defined to be { Ni, Ni+1, ..., Nj } where 1 <= i <= j <= K. The Maximum Subsequence is the continuous subsequence which has the largest sum of its elements. For examp…

1​​, N2N_2N​2​​, ..., NKN_KN​K​​ }. A continuous subsequence is defined to be { NiN_iN​i​​, Ni+1N_{i+1}N​i+1​​, ..., NjN_jN​j​​ } where 1≤i≤j≤K1 \le i \le j \le K1≤i≤j≤K. The Maximum Subsequence is the continuous subsequence which has the largest sum…

Problem Introduction In this problem, your goal is to compute the length of a longest common subsequence of three sequences. Problem Description Task.Given three sequences \(A=(a_1,a_2,\cdots,a_n)\); \(B = (b_1, b_2,\cdots,b_m)\), and \(C=(c_1,c_2,\c…

Dense 是一款 jQuery 插件,它提供一个简单的方法为设备提供精密像素比的图像,为你的网站带来视网膜支持,清除模糊,图像更清晰.通过简单地包括 jQuery 插件的页面上,就能实现响应式的视网膜(Rtina)图像支持. 您可能感兴趣的相关文章 Web 开发中很实用的10个效果[附源码下载] 精心挑选的优秀jQuery Ajax分页插件和教程 12款经典的白富美型 jQuery 图片轮播插件 让网站动起来!12款优秀的 jQuery 动画插件 精心挑选的美轮美奂的 jQuery 图片特效插…

最长公共子序列 英文缩写为LCS(Longest Common Subsequence).其定义是,一个序列 S ,如果分别是两个或多个已知序列的子序列,且是所有符合此条件序列中最长的,则 S 称为已知序列的最长公共子序列.而最长公共子串(要求连续)和最长公共子序列是不同的 应用 最长公共子序列是一个十分实用的问题,它可以描述两段文字之间的“相似度”,即它们的雷同程度,从而能够用来辨别抄袭.对一段文字进行修改之后,计算改动前后文字的最长公共子序列,将除此子序列外的部分提取出来,这种方法判断修改的…

本题要求在O(n)时间内求解.用delta储存相邻两个数的差,如果相邻的两个delta不同负号,那么说明子序列摇摆了一次.参看下图的nums的plot.这个例子的答案是7.平的线段部分我们支取最左边的一个点.除了最左边的边界点,我们要求delta != 0, 并且newDelta * delta <= 0.(这里不能只取<号),否则dot 5和7就会被忽略,因为他们的newDelta*delta = 0. def wiggleMaxLength(self, nums): ""…