Baekjoon Algorithm | Problem 2884: Alarm Clock

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Source

https://www.acmicpc.net/problem/2884

Problem

Solve Baekjoon Online Judge problem 2884, Alarm Clock.

Input

Follow the input format and constraints given in the original problem statement.

Output

Print the answer required by the problem.

Sample Input 1

10 10

Sample Output 1

9 25

Sample Input 2

0 30

Sample Output 2

23 45

Sample Input 3

23 40

Sample Output 3

22 55

Algorithm Classification

  • Math
  • Arithmetic

Solution

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {

    public static void main(String[] args) throws IOException {
        try (BufferedReader br = new BufferedReader(new InputStreamReader(System.in))) {
            String[] input = br.readLine().split(" ");
            final int inputHour = Integer.parseInt(input[0]);
            final int inputMinute = Integer.parseInt(input[1]);

            int hour;
            int minute;
            if (inputMinute < 45) {
                if (inputHour == 0) {
                    hour = 23;
                } else {
                    hour = (inputHour - 1);
                }
                minute = inputMinute + 60 - 45;
            } else {
                hour = inputHour;
                minute = inputMinute - 45;
            }
            System.out.println(hour + " " + minute);
        }
    }
}