#include <iostream>
using namespace std;

int main() {
    int n, x, y;
    cin >> n >> x >> y;

    int count = 0;
    // 苹果至少买 10 斤
    for (int apple = 10; apple * x <= n - 10 * y; apple++) {
        // 计算买完苹果后剩下的钱可以买多少斤梨
        int remaining = n - apple * x;
        // 剩下的钱能整除梨的单价且梨的数量不少于 10 斤
        if (remaining % y == 0 && remaining / y >= 10) {
            count++;
        }
    }
    cout << count << endl;
    return 0;
}    
/**************************************************************
	Problem: 1793
	User: panyuchen
	Language: C++
	Result: Accepted
	Time:16 ms
	Memory:2072 kb
****************************************************************/