48 young pioneers select the captain, the candidates are A, B, and C. On the way of billing, A gets 13 votes, B gets 10 votes, and C gets 7 votes. According to the rules, the person with the most votes is elected. In the future balloting, how many votes must A have at least to be elected.
48名少先队员选中队长，候选人是甲、乙、丙三人．开票途中，甲得13票，乙得10票，丙得7票．按照规定，得票最多的人当选．以后开票中，甲至少要得多少张票才能当选．
<result>8</result>