【整理】簡單的數學期望和概率DP

數學期望 P=Σ每一種狀態*對應的概率。 因為不可能枚舉完所有的狀態，有時也不可能枚舉完，比如拋硬幣，有可能一直是正面，etc。在沒有接觸數學期望時看到數學期望的題可能會覺得很闊怕（因為我高 ...

SPOJ Favorite Dice（數學期望）

BuggyD loves to carry his favorite die around. Perhaps you wonder why it's his favorite? Well, his d ...