0551 - Student Attendance Record I

Description (leetcode)

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 trueif the student is eligible for an attendance award, orfalseotherwise.

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'.

submission

impl Solution {
    pub fn check_record(s: String) -> bool {
        s.bytes().filter(|&b| b == b'A').count() < 2 && !s.contains("LLL")
    }
}