Three people, A, B, and C, participate in a competition with 30 multiple-choice questions. The scoring method is based on 30 points. For each correct answer, 4 points are added, and for each wrong answer, 1 point is deducted. No points are neither deducted nor added. For the number of questions answered correctly, the total scores of B and C are the same, only 1 point less than that of A, but the number of questions answered correctly by B and C is different from each other. It can be seen from this, what is the maximum total score obtained by A.
甲乙丙三人参加一个共有30个选择题的比赛．记分办法是在30分的基础上，每答对一题加4分，答错一题扣1分，不答既不扣分也不加分，赛完后发现根据甲所得总分可以准确算出他答对的题数，乙、丙二人所得总分相同，仅比甲少1分，但乙丙答对的题数却互不相同．由此可知，甲所得总分最多为多少．
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