2017年2月12日
TOJ-1353 Bridge
摘要： n people wish to cross a bridge at night. A group of at most two people may cross at any time, and each group must have a flashlight. Only one flashli 阅读全文
posted @ 2017-02-12 14:18 DGSX 阅读(266) 评论(0) 推荐(0)