//没那么麻烦把！写的比较low

import java.util.Scanner; public class Main { public static void main(String[] args) {
        Scanner sc = new Scanner(System.in); int hp=sc.nextInt(); int normal=sc.nextInt(); int bf=sc.nextInt(); int count=0; if(2*normal>=bf){
            count=hp%normal==0? hp/normal:hp/normal+1;
        } else{ int i=hp/bf; if(hp/bf!=0) { if (hp - bf * i 1; else count += 2;
            }
            count+=i;
        }
        System.out.println(count);
    }
}