摘要：
食物链Time Limit: 1000MS Memory Limit: 10000KTotal Submissions: 82346 Accepted: 24616Description动物王国中有三类动物A,B,C，这三类动物的食物链构成了有趣的环形。A吃B， B吃... 阅读全文
摘要：
Connections in Galaxy War In order to strengthen the defense ability, many stars in galaxy allied together and built many bidirectiona... 阅读全文