题目链接:http://codeforces.com/contest/158/problem/E E. Phone Talks time limit per test 3 seconds memory limit per test 256 megabytes input standard input output standard output Cool J has recently become a businessman Mr. Jackson, and he has to make a l…
C. Cd and pwd commands Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/problemset/problem/158/C Description Vasya is writing an operating system shell, and it should have commands for working with directories. To begin with, he dec…
C. String Manipulation 1.0 Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 codeforces.com/problemset/problem/91/B Description One popular website developed an unusual username editing procedure. One can change the username only by deleting some characte…
Cd and pwd commands time limit per test 3 seconds memory limit per test 256 megabytes input standard input output standard output Vasya is writing an operating system shell, and it should have commands for working with directories. To begin with, he…
题目链接: http://codeforces.com/problemset/problem/522/D D. Closest Equals time limit per test3 secondsmemory limit per test256 megabytes 问题描述 You are given sequence a1, a2, ..., an and m queries lj, rj (1 ≤ lj ≤ rj ≤ n). For each query you need to print…
D. Three-dimensional Turtle Super Computer 题目连接: http://www.codeforces.com/contest/638/problem/D Description A super computer has been built in the Turtle Academy of Sciences. The computer consists of n·m·k CPUs. The architecture was the paralellepip…
C. Road Improvement 题目连接: http://www.codeforces.com/contest/638/problem/C Description In Berland there are n cities and n - 1 bidirectional roads. Each road connects some pair of cities, from any city you can get to any other one using only the given…
B. Making Genome in Berland 题目连接: http://www.codeforces.com/contest/638/problem/B Description Berland scientists face a very important task - given the parts of short DNA fragments, restore the dinosaur DNA! The genome of a berland dinosaur has notin…
A. Home Numbers 题目连接: http://www.codeforces.com/contest/638/problem/A Description The main street of Berland is a straight line with n houses built along it (n is an even number). The houses are located at both sides of the street. The houses with od…
D. Running with Obstacles 题目连接: http://www.codeforces.com/contest/637/problem/D Description A sportsman starts from point xstart = 0 and runs to point with coordinate xfinish = m (on a straight line). Also, the sportsman can jump - to jump, he should…
C. Promocodes with Mistakes 题目连接: http://www.codeforces.com/contest/637/problem/C Description During a New Year special offer the "Sudislavl Bars" offered n promo codes. Each promo code consists of exactly six digits and gives right to one free…
B. Chat Order 题目连接: http://www.codeforces.com/contest/637/problem/B Description Polycarp is a big lover of killing time in social networks. A page with a chatlist in his favourite network is made so that when a message is sent to some friend, his fri…
A. Voting for Photos 题目连接: http://www.codeforces.com/contest/637/problem/A Description After celebrating the midcourse the students of one of the faculties of the Berland State University decided to conduct a vote for the best photo. They published t…
B. Photo to Remember Time Limit: 1 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/522/problem/B Description One day n friends met at a party, they hadn't seen each other for a long time and so they decided to make a group photo together…
D. Closest Equals Time Limit: 1 Sec Memory Limit: 256 MB 题目连接 http://www.lydsy.com/JudgeOnline/problem.php?id=3224 Description You are given sequence a1, a2, ..., an and m queries lj, rj (1 ≤ lj ≤ rj ≤ n). For each query you need to print the minimu…
A. Voting for Photos time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output After celebrating the midcourse the students of one of the faculties of the Berland State University decided to conduct…
B. Chat Order time limit per test 3 seconds memory limit per test 256 megabytes input standard input output standard output Polycarp is a big lover of killing time in social networks. A page with a chatlist in his favourite network is made so that wh…
传送门 A. Reposts time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output One day Polycarp published a funny picture in a social network making a poll about the color of his handle. Many of his friend…
VK Cup 2012 Round 3 (Unofficial Div. 2 Edition) 代码 VK Cup 2012 Round 3 (Unofficial Div. 2 Edition) A. Problem About Equation 每个杯子体积\[V=\frac{b+\sum{a_i}}{n}\] 判断是否有\(a_i > V\). B. File List 处理出'.'的位置. 第一个'.'和最后一个'.'特判字符长度是否合法. 连续的两点位置差\(d\in[2, 11]\)…
Facebook Hacker Cup 2014 Qualification Round比赛Square Detector题的解题报告.单击这里打开题目链接(国内访问需要那个,你懂的). 原题如下: Square Detector Problem Description You want to write an image detection system that is able to recognize different geometric shapes. In the first ver…
2014 Qualification Round Solutions 2013年11月25日下午 1:34 ...最简单的一题又有bug...自以为是真是很厉害! 1. Square Detector (20 Points) When facing a problem in a programming contest there are three main things to consider when planning your solution. In order of importanc…
D. Distance in Tree time limit per test 3 seconds memory limit per test 512 megabytes input standard input output standard output A tree is a connected graph that doesn't contain any cycles. The distance between two vertices of a tree is the length (…
VK news recommendation system daily selects interesting publications of one of n disjoint categories for each user. Each publication belongs to exactly one category. For each category i batch algorithm selects ai publications. The latest A/B test sug…
