[백준] 1712번 : 손익분기점 - Java(자바)

https://www.acmicpc.net/problem/1712

import java.util.*;
public class Main {
    public static void main(String args[]) {
        Scanner s=new Scanner(System.in);
        int a=s.nextInt();
        int b=s.nextInt();
        int c=s.nextInt();
        int n=c-b;
        
        if(n<=0) System.out.print(-1);
        else System.out.print(a/n+1);
    }
}