uri-1051

#include<bits/stdc++.h>
using namespace std;
int main()
{
    double salary,val1=0,val2=0,mot1=0,mot2=0,mot3=0,val3=0,mot6=0;
    cin>>salary;
    if(salary<=2000.00)
    {
        cout<<"Isento"<<endl;
    }
   else
   {if(salary>=2000.01&&salary<=3000.00)
    {
        salary=salary-2000.00;
         mot1=0.08*salary;

       printf("R$ %.2lf\n",mot1);
    }
    else if(salary>=3000.01&&salary<=45000.00)
    {
        salary-=3000.00;
        mot3=.18*salary+80.00;
         printf("R$ %.2lf\n",mot3);

    }
    else
    {
       salary-=4500.00;
       mot6=0.28*salary+350.00;
        printf("R$ %.2lf\n",mot6);

    }}
    return 0;
}