#include <iostream>
using namespace std;

int main() {
    int X, A, B;
    cin >> X >> A >> B;
    int count = 0;

    // 小狗至少买1只，最多能买 X / A 只
    for (int dogs = 1; dogs <= X / A; dogs++) {
        // 小猫至少买1只
        for (int cats = 1; cats <= X / B; cats++) {
            if (dogs * A + cats * B == X) {
                count++;
            }
        }
    }
    cout << count << endl;
    return 0;
}    
/**************************************************************
	Problem: 1016
	User: linmiaoling
	Language: C++
	Result: Accepted
	Time:13 ms
	Memory:2072 kb
****************************************************************/