#include <iostream>
using namespace std;
 
int main() {
    int X, A, B;
    cin>>X>>A>>B;
    int count=0;
    for (int dogs=1;dogs<=X/A;dogs++) {
        for (int cats=1;cats<=X/B;cats++){
            if (dogs*A+cats*B==X){
                count++;
            }
        }
    }
    cout<<count<<endl;
    return 0;
}  
/**************************************************************
	Problem: 1016
	User: panjinyan
	Language: C++
	Result: Accepted
	Time:15 ms
	Memory:2072 kb
****************************************************************/