Leetcode 551. Student Attendance Record I--判断是否奖励： A出现次数大于1返回false；L连续出现次数大于2返回false,中间隔断时从0开始计数

You are given a string representing an attendance record for a student. The record only contains the following three characters:java 'A' : Absent. 'L' : Late. 'P' : Present. A student could be rewarde

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