#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <algorithm>
using namespace std;

int main() {
	//freopen("TextFile1.txt", "r", stdin); freopen("TextFile2.txt", "w", stdout);
	double n, x, y;
	cin >> n >> x >> y;
	cout << round(min(x, y) + (n) / (1 / x + 1 / y));
}