include[HTML_REMOVED]

using namespace std;
int main()
{
double s;
cin>>s;//收入
if(s<=2000.00)
cout<<”Isento”;
else if(s>=2000.01&&s<=3000.00)
printf(“R$ %.2lf”,(s-2000)*0.08); else if(s>=3000.00&&s<=4500.00) printf(“R$ %.2lf”,(s-3000)0.18+80);
else if(s>4500)
printf(“R$ %.2lf”,(s-4500)0.28+80+270);
return 0;
}