A school holds a Go competition, and each player has to play a game against all other players. A total of 36 games were played. How many people participated in this competition.
某校举行围棋比赛，每个选手都要与其他所有选手各赛一场．一共进行36场比赛．这次比赛有多少人参加．
<result>9</result>