백준 1408 24 / JAVA

 

https://www.acmicpc.net/problem/1408 

1408번: 24

> 풀이

import java.util.Scanner;

/*
 * boj 1408 24
 * #bronze2
 * #수학
 */

public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner sc = new Scanner(System.in);
		String[] startTime = sc.nextLine().split(":");
		String[] endTime = sc.nextLine().split(":");
		
		int startHour = Integer.parseInt(startTime[0]);
		int startMin = Integer.parseInt(startTime[1]);
		int startSec = Integer.parseInt(startTime[2]);
		int endHour = Integer.parseInt(endTime[0]);
		int endMin = Integer.parseInt(endTime[1]);
		int endSec = Integer.parseInt(endTime[2]);
		
		String[] answer = new String[5];
		answer[1] = answer[3] = ":";
		
		if(endSec - startSec < 0) {
			endMin--;
			endSec += 60;
		}
				
		if(endMin - startMin < 0) {
			endHour--;
			endMin += 60;
		}
		
		if(endHour - startHour < 0) {
			endHour += 24;
		}
		
		answer[4] = String.valueOf(endSec - startSec);
		answer[2] = String.valueOf(endMin - startMin);
		answer[0] = String.valueOf(endHour - startHour);
		
		for(String x : answer) {
			if(x.length() == 1 && !":".equals(x)) {
				System.out.print('0'+x);
			} else {
				System.out.print(x);
			}	
		}
	}
}