摘要：
A. Free Cash time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output A. Free Cash time limit per 阅读全文
摘要：
B. Sereja and Suffixes time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output B. Sereja and Suff 阅读全文