64 teams randomly form teams to compete in pairs. The winners will enter the next round, and the losers will be eliminated. How many matches will be needed to determine the final champion.
64支球队两两随机组队比赛，胜者进入下一轮，负者淘汰出局，需要比赛多少场才能分出最后的冠军．
<gadget id="calculator">64 - 1</gadget>
<output>63</output>

<result>63</result>