#include<iostream>
using namespace std;
int main(){ 
   int x,a,b,i,f=0;
   cin>>x>>a>>b;
   for(i=1;i<=x / a;i++)
   { 
      if((x-i * a>=b) && (x-i*a)%b==0){
        f++;
      }
   }
   cout<<f<<endl;
   return 0;
}
/**************************************************************
	Problem: 1016
	User: lidongbo
	Language: C++
	Result: Accepted
	Time:15 ms
	Memory:2072 kb
****************************************************************/