hdu1408精度问题，好坑人啊

#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;    }}