[백준] 2163번 : 초콜릿 자르기 - Java(자바)

https://www.acmicpc.net/problem/2163

import java.util.*;
public class Main {
    public static void main(String args[]) {
        Scanner s=new Scanner(System.in);
        int n=s.nextInt();
        int m=s.nextInt();
        System.out.print(n*m-1);
    }
}