There are 47 people in class 41. It is necessary to vote for one person from A, B, and C to be the class leader. It is known that everyone has voted for one of the three people, and at a certain moment during the vote counting process, A Get 15 votes, B gets 13 votes, and C gets 8 votes. If the candidate who gets more votes than the other two will become the class leader, then A will get the minimum number of votes to ensure his election.
四1班共有47人，要从甲、乙、丙三人中投票选举一人担任班长，已知每个人都投了一票给三人中的一人，并且在计票过程中的某一时刻，甲得到15票，乙得到13票，丙得到8票，如果得票数比其他两人都多的候选人将成为班长，那么甲最少再得多少票就能够保证当选．
<result>5</result>