Grading Students Solution in Java | HackerRank | Grading Students HackerRank Solution

Grading Students Solution in Java
Grading Students HackerRank Solution in Java

Problem:

Given a time in -hour AM/PM format, convert it to military (24-hour) time.

Note: Midnight is 12:00:00AM on a 12-hour clock, and 00:00:00 on a 24-hour clock. Noon is 12:00:00PM on a 12-hour clock, and 12:00:00 on a 24-hour clock.

Function Description

Complete the timeConversion function in the editor below. It should return a new string representing the input time in 24 hour format.

timeConversion has the following parameter(s):

s: a string representing time in hour format

Input Format

A single string containing a time in -hour clock format (i.e.: or ), where and .

Constraints

All input times are valid

Output Format

Convert and print the given time in -hour format, where .

Sample Input 0

07:05:45PM

Sample Output 0

19:05:45

https://www.hackerrank.com/challenges/grading-students/problem

Grading Students HackerRank Solution in Java
Grading Students Solution in 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 {
    public static List gradingStudents(List grades) {
        List<Integer> temp=new ArrayList();
        for(int i=0;i<grades.size();i++){
            int m=grades.get(i);
            if(m>=38){
                if((m%5)>=3){
                    m+=(5-(m%5));
                }
            }
            temp.add(m);
        }
            return temp;
    }

}

public class Solution {
    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();
    }
}

Grading Students Solution in Java | HackerRank | Grading Students HackerRank Solution