[SW Expert Academy] 시간 개념 (D3)

SW Expert Academy

SW Expert Academy

 

import java.util.Scanner;

class Solution {
   public static void main(String[] args) {
      Scanner sc = new Scanner(System.in);
      int t = sc.nextInt();

      for (int tc = 1; tc <= t; tc++) {
         String time1 = sc.next();

         int h1 = Integer.parseInt(time1.substring(0, 2));
         int m1 = Integer.parseInt(time1.substring(3, 5));
         int s1 = Integer.parseInt(time1.substring(6));

         String time2 = sc.next();

         int h2 = Integer.parseInt(time2.substring(0, 2));
         int m2 = Integer.parseInt(time2.substring(3, 5));
         int s2 = Integer.parseInt(time2.substring(6));

         if (h2<h1||(h2==h1&&m2<m1)||(h2==h1&&m2==m1&&s2<s1)) {
            h2 += 24;
         }

         int ah, am, as;

         if (s2 < s1) {
            s2 += 60;
            m2 -= 1;
         }

         as = s2 - s1;

         if (m2 < m1) {
            m2 += 60;
            h2 -= 1;
         }

         am = m2 - m1;

         ah = h2 - h1;

         System.out.printf("#" + tc + " %02d:%02d:%02d", ah, am, as);
         System.out.println();

      }
   }
}

 

 

초로 계산해서도 다시 풀어보자

 

import java.util.Scanner;
 
class Solution {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int t = sc.nextInt();
 
        for (int tc = 1; tc <= t; tc++) {
            String str1 = sc.next();
 
            int s1 = Integer.parseInt(str1.substring(0, 2)) * 3600 + Integer.parseInt(str1.substring(3, 5)) * 60
                    + Integer.parseInt(str1.substring(6));
 
            String str2 = sc.next();
 
            int s2 = Integer.parseInt(str2.substring(0, 2)) * 3600 + Integer.parseInt(str2.substring(3, 5)) * 60
                    + Integer.parseInt(str2.substring(6));
 
            if (s1 > s2) {
                s2 += 24 * 3600;
            }
 
            // System.out.println(s2-s1);
 
            int sumS = s2 - s1;
 
            int ah = sumS / 3600;
            int am = sumS % 3600 / 60;
            int as = sumS % 60;
 
            System.out.printf("#" + tc + " " + "%02d:%02d:%02d\n", ah, am, as);
 
        }
 
    }
}

 

분은 시간으로 나누고 남은 것 중에 60으로 나눈 몫

초는 전체를 60으로 나눈 나머지