ZOJ-1494

import java.util.Scanner;

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

while (true)
{
int n = sc.nextInt();

if (n == 0)
break;

int u = sc.nextInt();
int d = sc.nextInt();

int minutes = 0;
int total = 0;

while (true)
{
total += u;
minutes++;

if (total >= n)
break;

total -= d;
minutes++;
}
System.out.println(minutes);
}
}
}