In school a student gets rewarded if he has an attendance record without being absent for more than once or being late for 3 times continuously.
Given a student’s attendance record represented by a string. The record only contains the following three characters:
- ‘A’ : Absent.
- ‘L’ : Late.
- ‘O’ : On-Time.
Check whether the student qualifies for the reward.
Record: "OLLAOOOLLO" Output: False Explanation: The student does not qualify for a reward because "LLA" means he was late 3 times in a row. Record: "OLLOAOLLO" Output: True
Initialize prev = null, lateCount=0, absentCount=0.
Iterate the array and
- If the current character is ‘A’, increment the absentCount.
- If the current character is either ‘L’ or ‘A’, check the prev character is not ‘O’ (means again prev character is either ‘A’ or ‘L’) then increment the lateCount.
- Do prev = current character at the end of each iteration.
- If anytime absentCount>1 OR lateCount>2, return false.
Record: OLLAOOOLLO Attendance reward: false