#include<stdio.h>
void main()
{
	int x,a,b,i,j,c=0;
	scanf("%d%d%d",&x,&a,&b);
	for(i=1;i<x/a;i++){
		j=(x-i*a)/b;
		if((x-i*a)%b==0&&i*a+j*b==x){
			c++;
		}
		
	}
	printf("%d",c);
}
/**************************************************************
	Problem: 1016
	User: admin
	Language: C
	Result: Accepted
	Time:23 ms
	Memory:1144 kb
****************************************************************/