hdu 1049

#include <iostream>using namespace std;int n,u,d;int height;int _time;int main(){    while(cin>>n>>u>>d)    {         if((n&&u&&d)==0)             break;         height = 0;         _time = 0;         while(height < n)         {             height += u;             _time++;             if(height >= n)             {                  cout<<_time<<endl;                  break;             }             height -= d;             _time++;         }    }    return 0;}