There is a class of students in the sports meeting, 10 people who enter the top three, it is known that they will get 9 points for the first place, 5 points for the second place, 2 points for the third place, and no points for other places. The class has a total score of 64 points, among which the number of people who won the first place is at most.
某班学生在运动会上有，进入前三名的10人次，已知获第一名可得9分，获第二名可得5分，获第三名可得2分，其他名次不计分，该班共计得分64分，其中获第一名至多有多少人次．
<result>5</result>