摘要： Time Limit:5000MSMemory Limit:128000KTotal Submissions:27704Accepted:7336DescriptionYou are given a bunch of wooden sticks. Each endpoint of each stick is colored with some color. Is it possible to align the sticks in a straight line such that the colors of the endpoints that touch are of the same c 阅读全文

摘要： Time Limit:3500MSMemory Limit:65536KTotal Submissions:14328Accepted:5393DescriptionA square is a 4-sided polygon whose sides have equal length and adjacent sides form 90-degree angles. It is also a polygon such that rotating about its centre by 90 degrees gives the same polygon. It is not the only p 阅读全文