#include <bits/stdc++.h>
using namespace std;
int x,y,a;
int main()
{   cin>>a>>x>>y;
    if(a%(x-y)==0)
    cout<<a/(x-y);
    else
    cout<<a/(x-y)+1;
    return 0;
}

#SadBoy(Alone)

#include<bits/stdc++.h>
using namespace std;
int x, y, a;
int main()
{
 cin >> a >> x >> y;
 if (x<y) cout << "Cho khong bat duoc tho";
 else
 {
  if (a%(x-y)==0) cout << a/(x-y);
  else cout << (a/(x-y))+1;
 }
 return 0;
}