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
}