摘要：
B. Mr. Kitayuta's Colorful Graph time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output B. Mr. K 阅读全文
摘要：
A. Bear and Friendship Condition time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output A. Bear 阅读全文