551. Student Attendance Record I

Easy

You are given a string s representing an attendance record for a student where each character signifies whether the student was absent, late, or present on that day. The record only contains the following three characters:

• 'A': Absent.
• 'L': Late.
• 'P': Present.

The student is eligible for an attendance award if they meet both of the following criteria:

• The student was absent ('A') for strictly fewer than 2 days total.
• The student was never late ('L') for 3 or more consecutive days.

Return true if the student is eligible for an attendance award, or false otherwise.

Solution

class Solution:
    def checkRecord(self, s: str) -> bool:
        lates = 0
        absents = 0

        for c in s:
            if c == "L":
                lates += 1
                if lates == 3:
                    return False
            else:
                if c == "A":
                    absents += 1
                    if absents == 2:
                        return False
                lates = 0

        return True