ACM-ICPC 2017 Asia Urumqi：A. Coins（DP） 组合数学
摘要：
Alice and Bob are playing a simple game. They line up a row of nn identical coins, all with the heads facing down onto the table and the tails upward. 阅读全文
posted @ 2018-07-29 21:07 九月旧约 阅读(254) 评论(0) 推荐(0) 编辑
