摘要：
B. Vladik and Complicated Book time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output B. Vladik 阅读全文
摘要：
A. Vladik and Courtesy time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output A. Vladik and Cou 阅读全文