Student attendance record i

String

50.0% acceptance

Jan 13, 2026

854

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

Rust

Time O(n)

Space O(1)

LeetCode

solution.rs

impl Solution {
  pub fn check_record(s: String) -> bool {
    let absences = s.chars().filter(|&c| c == 'A').count();
    if absences >= 2 {
      return false;
    }
    !s.contains("LLL")
  }
}