helpful

来源: 于 2023-11-14 20:12:30 [旧帖] [给我悄悄话] 本文已被阅读：次

很多公司的面试题，就跟竞赛题差不多，参加过竞赛的绝对占便宜。
比如，For a fair die, what is the expected number of rolls to have all 6 numbers?