There are 121 players participating in a chess competition in the sixth grade. The competition arrangement is a single elimination match (that is, one person is eliminated in each game), so how many games need to be held in total to produce a champion.
六年级举行象棋比赛，有121人参加，赛事安排是单场淘汰赛(即每场比赛淘汰一个人)，那么共需举行多少场比赛，才能产生冠军．
<gadget id="calculator">121 - 1</gadget>
<output>120</output>

<result>120</result>