100 teams in a single round-robin knockout match (that is, those who lose after one game and withdraw from the game) finally produce a champion. How many games are needed in total?
100个球队单循环淘汰赛(即一场比赛后输的退出比赛)最后产生一个冠军，一共需要多少场比赛？
<gadget id="calculator">100 - 1</gadget>
<output>99</output>

<result>99</result>