(Easy) Student Attendance Record I LeetCode

Description:

You are given a string representing an attendance record for a student. The record only contains the following three characters:

 

1. 'A' : Absent.
2. 'L' : Late.
3. 'P' : Present.

 

A student could be rewarded if his attendance record doesn't contain more than one 'A' (absent) or more than two continuous 'L' (late).

You need to return whether the student could be rewarded according to his attendance record.

Example 1:

Input: "PPALLP"
Output: True

 

Example 2:

Input: "PPALLL"
Output: False

 

Accepted

56,021

Submissions

123,047

 

Solution:

 

class Solution {
    public boolean checkRecord(String s) {
        
        if(s.length()==0||s==null){
            return false;
        }
        
        boolean check_A_flag = false;
        
        boolean check_L_flag = false;
        int A_count = 0;
        int L_count = 0;
        for(int i = 0; i<s.length();i++){
            
            if(s.charAt(i)=='A'){
                
                A_count++;
                if(A_count>1){
                    check_A_flag = true;
                }
            }
            
            
            if(s.charAt(i)=='L'){
                L_count++;
                
                if(L_count>=3){
                    check_L_flag = true;
                }
            }
            else{
                
                if(L_count<3){
                    
                    L_count = 0;
                }
                
            }
            
            
        }
        
        return (!(check_A_flag||check_L_flag));
        
    }
}