29 teams participate in the city basketball competition, and the competition adopts a single elimination system (one player is eliminated in each game), how many games will be needed to win the championship.
29只球队参加市篮球竞技赛，比赛以单场淘汰制(每场淘汰一人)，一共要多少场才可以得出冠军．
<gadget id="calculator">29 - 1</gadget>
<output>28</output>

<result>28</result>