#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: admin
	Language: C++
	Result: Accepted
	Time:16 ms
	Memory:2072 kb
****************************************************************/