学步园

#include<iostream>
using namespace std;
int main()
{
    int d,time;
    double v,V;
    while(cin>>V>>v)
    {
        d=0;time=(int)(V*1.0/v);
        if(V-time*v>0.000001)//精度
        time++;
        while(V>0.00001)
        {
            d++;
            V-=d*v;
            if(V>0.00001)
            time++;
        }
        cout<<time<<endl;
    }
}