#include<iostream>

using namespace std;

int main(void)
{
	int total_money;//总金额
	int dog_price,cat_price;//狗单价,猫单价 
	int cat;
	cin>>total_money>>dog_price>>cat_price;//1700 31 21
	
	int sum=0;
	for(int i=1 ; i<=total_money/dog_price ; i++)
	{
		cat=(total_money-i*dog_price)/cat_price;
		/*cout<<i<<"     "<<cat<<endl;*/
		if(i*dog_price+cat*cat_price==total_money){
			sum++;
		}
	}
	
	cout<<sum<<endl;
    return 0;
}
/**************************************************************
	Problem: 1016
	User: wtq001
	Language: C++
	Result: Wrong Answer
****************************************************************/