Leetcode 551. Student Attendance Record I--判斷是否獎勵： A出現次數大於1返回false；L連續出現次數大於2返回false,中間隔斷時從0開始計數

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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