#include <iostream>
using namespace std;

int main() {
    double n, x, y;
    cin >> n >> x >> y; 
    int maxFlowers = (int)(n * 100 / (x + y));
    cout << maxFlowers << endl; 

    return 0;
}
/**************************************************************
	Problem: 1331
	User: fuhoubin
	Language: C++
	Result: Wrong Answer
****************************************************************/