摘要：
time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Ivan is playing a strange game. He has a 阅读全文
摘要：
time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output You are given a string s consisting only 阅读全文
摘要：
time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Luba has to do n chores today. i-th chor 阅读全文