include[HTML_REMOVED]
include[HTML_REMOVED]
using namespace std;
int main(){
double a;
cin>>a;
if(a>0&&a<=2000.0) cout<<”Isento”;
else if(a>2000.0&&a<=3000) printf(“R$ %.2lf”,(a-2000)*0.08);
else if(a>3000.0&&a<=4500) printf(“R$ %.2lf”,(a-3000)0.18+80);
else if(a>4500.0) printf(“R$ %.2lf”,(a-4500)0.28+350);
return 0;
}