C423 Proficient at 21 Points

Furthermore, under normal circumstances, there was a rule that only the number of bets could be placed in each round. At most, it would be during the competition. If you wanted a player, you could choose Duble.

In this competition, the player could choose to bet 10 ~ 1000 chips before each round, and it could also choose Duble.

However, if the player was bet