Two schools, A and B, respectively send 7 students to participate in a long-distance running competition. The rule is: the k-th student who reaches the finish line will score k points (the one who has not reached the finish line in parallel), and the school with the least total score wins, then the total score of the winning team How many possibilities are there.
甲、乙两个学校分别派出7名学生参加一次长跑比赛，规则是：第k个到达终点的学生记k分(没有并列到达终点的)，总分少的学校获胜，那么获胜队的总分有多少种可能．
<gadget id="calculator">52 - 28</gadget>
<output>24</output>

<gadget id="calculator">24 + 1</gadget>
<output>25</output>

<result>25</result>