백준 #29863번 Arno's Sleep Schedule

import java.util.Scanner;
public class Main {
	public static void main(String[] args) {
		
		Scanner sc = new Scanner(System.in);
		
		int a = sc.nextInt();
		int b = sc.nextInt();
		
		if(20 <= a && a <= 23) {
			System.out.println(24 - a + b);
		}else {
			System.out.println(b - a);
		}
		sc.close();
	}
}