Sync LeetCode submission - Student Attendance Record I (rust)

Author: JMoogs

problems/student_attendance_record_i/solution.rs

@@ -0,0 +1,41 @@
+    impl Solution {
+    pub fn check_record(s: String) -> bool {
+        let mut absents = 0;
+        let mut conseq_late = 0;
+        let mut late_last = false;
+        for c in s.chars() {
+            match c {
+                'A' => {
+                    if absents == 1 {
+                        return false;
+                    } else {
+                        absents += 1;
+                        late_last = false;
+                        conseq_late = 0;
+                    }
+                }
+                'L' => {
+                    // We always add one if there are none
+                    if conseq_late == 0 {
+                        conseq_late += 1;
+                    }
+                    if late_last {
+                        conseq_late += 1;
+                    }
+                    if conseq_late == 3 {
+                        return false;
+                    }
+
+                    late_last = true;
+                }
+                'P' => {
+                    late_last = false;
+                    conseq_late = 0;
+                }
+                _ => unreachable!(),
+            }
+        }
+
+        return true;
+    }
+    }