#include<iostream>
#include<cstdlib>

using namespace std;

void test(int R , int F ,int &Num, double *D)
{

    double total=0;
//    D = new double[1000];
    Num=0;

    do
    {
        D[Num]=R+F;
        total+=D[Num];
        Num++;
    }
    while(total<=9);
    do
    {
        D[Num]=(R+F)/2;
        total+=D[Num];
        Num++;
    }
    while(total<=19);

    for(int i=1; i<Num; i++)
    {
        D[i]+=D[i-1];
    }
    cout<<"Num= "<<Num<<endl;
}

int main()
{

    int R,F;
    int Num;
//    double *D;
//double *D=new double[1000];
double D[1000];
    cout<<"please input R & F: "<<endl;
    cout<<"R: ";
    cin>>R;
    cout<<"F: ";
    cin>>F;
    test(R,F,Num,D);

    for(int i=0; i<Num; i++)
    {

        cout<<D[i]<<endl;
    }

    return 0;

}