#include <iostream>
using namespace std;
signed main() {
int L,V1,V2;
cin >> L >> V1 >> V2;
cout << L/(V1+V2);
}
#include <iostream>
using namespace std;
signed main() {
int L,V1,V2;
cin >> L >> V1 >> V2;
cout << L/(V1+V2);
}