bzoj2318 Spoj4060 game with probability Problem

2318: Spoj4060 game with probability Problem Time Limit: 1 Sec   Memory Limit: 128 MB Submit: 259   Solved: 108 [ Submit][ Status][ Discuss] Description Alice和Bob在玩一個遊戲。有n個石子在這裏,Alice和Bob輪流投擲硬幣,若是正面朝上
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