1 /******************************************************
 2 杭电acm 1049题 已AC
 3 *****************************************************/
 4 #include <iostream>
 5 using namespace std;
 6 int main()
 7 {
 8     int n,u,d;
 9     int current,min;
10     cin>>n>>u>>d;
11     while(n)
12     {
13         current=0;
14         min=0;
15         while(current<n)
16         {
17             min++;
18             current+=u;
19             if(current==n||current>n)
20                 break;
21             min++;
22             current=current-d;
23         }
24         cout<<(min)<<endl;
25         cin>>n>>u>>d;
26     }
27     return 0;
28 }