The busses in Berland are equipped with a video surveillance system. The system records information about changes in the number of passengers in a bus after stops. If xx is the number of passengers in a bus just before the current bus stop and yy is…
The busses in Berland are equipped with a video surveillance system. The system records information about changes in the number of passengers in a bus after stops. If xx is the number of passengers in a bus just before the current bus stop and yy is…
在pygame写游戏出现pygame.error: video system not initialized 源代码 import sysimport pygamedef run_game(): pygame.init() screen = pygame.display.set_mode((1200,800)) pygame.display.set_caption("Alien Invasion")#主循环while True: #监视键盘和鼠标事件 for event in pyga…
Squats Time Limit: 1000MS Memory Limit: 262144KB 64bit IO Format: %I64d & %I64u Submit Status Description Pasha has many hamsters and he makes them work out. Today, n hamsters (n is even) came to work out. The hamsters lined up and each hamster e…
Crash Time Limit: 1000MS Memory Limit: 262144KB 64bit IO Format: %I64d & %I64u Submit Status Description During the "Russian Code Cup" programming competition, the testing system stores all sent solutions for each participant. We know th…
Ford Prefect got a job as a web developer for a small company that makes towels. His current work task is to create a search engine for the website of the company. During the development process, he needs to write a subroutine for comparing strings S…
今天在github上找到一个用pygame做的Python游戏,但是clone到本地运行的时候却冒出了“mixer system not initialized”这样的问题.其实这句话说的就是音频混音器(具体指的就是双击右下角小喇叭图标后弹出的音量控制台)没有初始化,由于我的电脑重装过以后没有装声卡驱动,所以才导致了这个问题,安装声卡驱动以后,问题迎刃而解.…
(点击此处查看原题) 题意分析 已知 n , p , w, d ,求x , y, z的值 ,他们的关系为: x + y + z = n x * w + y * d = p 思维法 当 y < w 的时候,我们最多通过1e5次枚举确定答案 而当 y >= w 的时候,平局所得分为:y * d = (y-w)*d + w*d ,可以看作平局的局数为 y - w ,多出的w*d贡献给 (w*d)/w = d 局胜局,所以胜局为 x + d ,说明此时用x+y局胜局和平局得到的分数可以由 x + d…
Elimination Time Limit: 1000MS Memory Limit: 262144KB 64bit IO Format: %I64d & %I64u Submit Status Description The finalists of the "Russian Code Cup" competition in 2214 will be the participants who win in one of the elimination rounds.…
Vladik had started reading a complicated book about algorithms containing n pages. To improve understanding of what is written, his friends advised him to read pages in some order given by permutation P = [p1, p2, ..., pn], where pi denotes the numbe…
Pasha is participating in a contest on one well-known website. This time he wants to win the contest and will do anything to get to the first place! This contest consists of n problems, and Pasha solves ith problem in ai time units (his solutions are…
You are policeman and you are playing a game with Slavik. The game is turn-based and each turn consists of two phases. During the first phase you make your move and during the second phase Slavik makes his move. There are nn doors, the ii-th door ini…
In the beginning of the new year Keivan decided to reverse his name. He doesn't like palindromes, so he changed Naviek to Navick. He is too selfish, so for a given n he wants to obtain a string of n characters, each of which is either 'a', 'b' or 'c'…
Medicine faculty of Berland State University has just finished their admission campaign. As usual, about 80%80% of applicants are girls and majority of them are going to live in the university dormitory for the next 44 (hopefully) years. The dormitor…
On the way to school, Karen became fixated on the puzzle game on her phone! The game is played as follows. In each level, you have a grid with n rows and m columns. Each cell originally contains the number 0. One move consists of choosing one row or…
B. Sonya and Exhibition time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Sonya decided to organize an exhibition of flowers. Since the girl likes only roses and lilies, she decided that only…
