A middle school held a table tennis competition. There were 5 people in Xiao Ming’s class who participated in the knockout round, and one person was selected to participate in the school’s final. Teacher Yang, the head teacher, counted the number of games: “Because 5 is an odd number, one player failed in the first round. There must be one failure in the 2 rounds, and a total of 4 games are needed." After selecting a team member, a total of 37 classes in the school will participate in the finals, and knockout matches will also be adopted. Do you know how many byes there are?
某中学举行乒乓球比赛，小明他们班有5人进行淘汰赛，选出1人参加学校的决赛，班主任杨老师计算一下比赛的次数："由于5是奇数，所以第一论有一个队员落空，第2轮还得出现一次落空，一共需要进行4场比赛．"选拔出一个队员后，学校共有37个班级参加决赛，也采用淘汰赛，你知道共有多少轮空的次数吗？
<result>4</result>