import java.util.Scanner;
public class Main {

	public static void main(String[] args) {
		Scanner input = new Scanner(System.in);
		int n = input.nextInt();
		int x = input.nextInt();
		int y = input.nextInt();
		int count = 0;
		for(int i = 10;i <= n - 10 * y / x;i++) {
			for(int j = 10;j <= n - 10 * x / y;j++) {
				if(i * x + j * y == n ) {
					count++;
				}
			}
		}
		System.out.println(count);
		}
	}
/**************************************************************
	Problem: 1793
	User: admin
	Language: Java
	Result: Accepted
	Time:1459 ms
	Memory:40364 kb
****************************************************************/