摘要：
Description Rami went back from school and he had an easy homework about bitwise operations (and,or,..) The homework was like this : You have an equat 阅读全文
摘要：
Description A group of junior programmers are attending an advanced programming camp, where they learn very difficult algorithms and programming techn 阅读全文
摘要：
Description Tourist likes competitive programming and he has his own Codeforces account. He participated in lots of Codeforces Rounds, solved so many 阅读全文