#include<bits/stdc++.h>
using namespace std;
int main()
{
    int a,b,n;
    cin>>n>>a>>b;
    cout<<n/(a+b);
    return 0;
}

#include<bits/stdc++.h>
using namespace std;
int main()
{
int n,a,b;
cin>>n>>a>>b;
cout<<n/(a+b);
return 0;
}