摘要:
题目描述 在一次运会上,有一个比赛项目,共有N个人参加比赛,要将这N个人分组,每组人数不少于K个,问有多少种分组方式? 比如有16个... 阅读全文
摘要:
Description A tree is an undirected connected graph without cycles. You are given a tree of n vertices. Find the number of ways to choose exactly k ve 阅读全文
摘要:
Description A tree is an undirected connected graph without cycles... 阅读全文