摘要：
题意太难读懂。 读懂了就是水题了E -The Lessons of the PastTime Limit:1000MSMemory Limit:65536KB64bit IO Format:%I64d & %I64uSubmitStatusPracticeURAL 1904DescriptionIt was the middle of the 23rd century. Alien creatures suddenly came out from hyperspace and attacked the Twenty-fifth colonization mission just whe 阅读全文
