The school held a class table tennis competition. A total of 16 teams participated, and the game adopted a single elimination system (that is, one team was eliminated in each game). How many games will be played in total to produce a champion.
学校举办班级乒乓球比赛．共有16支球队参加，比赛采用单场淘汰制(即每场比赛淘汰1支球队)．一共要进行多少场比赛后才能产生冠军．
<gadget id="calculator">8 + 4 + 2 + 1</gadget>
<output>15</output>

<result>15</result>