n个人参加锦标赛

[（ヅ）]

每轮分成floor(n/2)组举行1v1淘汰赛，如果那一轮参加人数是奇数，那么随机选一个人进入下一轮.总共要举行多少场比赛，为什么?

(n = 2^k是很显然的结果)

[YWY]

n-1

[（ヅ）]

n-1

为什么?

[YWY]

n-1: Each match eliminates a person. It takes n-1 matches until one person remains.

[（ヅ）]

n-1: Each match eliminates a person. It takes n-1 matches until one person remains.

Excellent!