GradingStudents.java

import java.io.*;
import java.math.*;
import java.security.*;
import java.text.*;
import java.util.*;
import java.util.concurrent.*;
import java.util.function.*;
import java.util.regex.*;
import java.util.stream.*;
import static java.util.stream.Collectors.joining;
import static java.util.stream.Collectors.toList;

class Result {

    /*
     * Complete the 'gradingStudents' function below.
     *
     * The function is expected to return an INTEGER_ARRAY.
     * The function accepts INTEGER_ARRAY grades as parameter.
     */

    public static List<Integer> gradingStudents(List<Integer> grades) {
        List<Integer> l = new ArrayList<>();
        for(int i=0;i<grades.size();i++){
          if(grades.get(i) < 38){
             l.add(grades.get(i));
          }else{
             if((grades.get(i) + 1)%5 == 0){
                 l.add(grades.get(i) + 1);
             }else if((grades.get(i) + 2)%5 == 0){
                 l.add(grades.get(i) + 2);  
             }else{
                 l.add(grades.get(i));
             }
          } 

        }

        return l; 

    }

}

public class GradingStudents {
    public static void main(String[] args) throws IOException {
        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));
        BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(System.getenv("OUTPUT_PATH")));

        int gradesCount = Integer.parseInt(bufferedReader.readLine().trim());

        List<Integer> grades = IntStream.range(0, gradesCount).mapToObj(i -> {
            try {
                return bufferedReader.readLine().replaceAll("\\s+$", "");
            } catch (IOException ex) {
                throw new RuntimeException(ex);
            }
        })
            .map(String::trim)
            .map(Integer::parseInt)
            .collect(toList());

        List<Integer> result = Result.gradingStudents(grades);

        bufferedWriter.write(
            result.stream()
                .map(Object::toString)
                .collect(joining("\n"))
            + "\n"
        );

        bufferedReader.close();
        bufferedWriter.close();
    }
}