http://codeforces.com/gym/100989/problem/H After the data structures exam, students lined up in the cafeteria to have a drink and chat about how much they have enjoyed the exam and how good their professors are. Since it was late in the evening, the…

题目链接: 传送门 Lawnmower time limit per test:2 second     memory limit per test:256 megabytes Description You have a garden consisting entirely of grass and weeds. Your garden is described by an n × m grid, with rows numbered 1 to n from top to bottom, an…

A. The New Year: Meeting Friends time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output There are three friend living on the straight line Ox in Lineland. The first friend lives at the point x1, t…

A. Memory and Crow time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output There are n integers b1, b2, ..., bn written in a row. For all i from 1 to n, values ai are defined by the crows performi…

New Year is coming, and Jaehyun decided to read many books during 2015, unlike this year. He has n books numbered by integers from 1 to n. The weight of the i-th (1 ≤ i ≤ n) book is wi. As Jaehyun's house is not large enough to have a bookshelf, he k…

You are given coins of different denominations and a total amount of money amount. Write a function to compute the fewest number of coins that you need to make up that amount. If that amount of money cannot be made up by any combination of the coins,…

Ball 题目链接: http://acm.hdu.edu.cn/showproblem.php?pid=5821 Description ZZX has a sequence of boxes numbered 1,2,...,n. Each box can contain at most one ball. You are given the initial configuration of the balls. For 1≤i≤n, if the i-th box is empty the…

E - bits-EqualizerTime Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://acm.hust.edu.cn/vjudge/contest/view.action?cid=87794#problem/K Description You are given two non-empty strings S and T of equal lengths. S contains the characters 0, 1 and ?, where…

The Pilots Brothers' refrigerator Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 19356   Accepted: 7412   Special Judge Description The game "The Pilots Brothers: following the stripy elephant" has a quest where a player needs to o…

Covered Path time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output The on-board computer on Polycarp's car measured that the car speed at the beginning of some section of the path equals v1 meter…