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.

Example 1:

Input: s = "PPALLP"
Output: true
Explanation: The student has fewer than 2 absences and was never late 3 or more consecutive days.

Example 2:

Input: s = "PPALLL"
Output: false
Explanation: The student was late 3 consecutive days in the last 3 days, so is not eligible for the award.

Constraints:

• 1 <= s.length <= 1000

• s[i] is either 'A', 'L', or 'P'.

解題

func checkRecord(s string) bool {
    absent := 0
    late := 0

    for i := 0; i < len(s); i++ {
        if s[i] == 'A' {
            absent++
        }

        if s[i] == 'L' {
            late++
        }

        if s[i] != 'L' {
            late = 0
        }

        if absent >= 2 || late >= 3 {
            return false
        }
    }

    return true
}