[ 백준 ] 1001번 A-B (JAVA)

import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		
		int i = scan.nextInt();
		int j = scan.nextInt();
		int k = i-j;
		if((0<i && i<10) && (0<j && j<10)){
			System.out.println(k);
		}
	}
}