#include <iostream>
using namespace std;
int main() {
	float sum =0,a;
	cin>>a;
	if(a<=100000)
		sum=a*10/100;
	else if(a<=200000)
		sum = 100000*10/100+(a-100000)*7.5/100;
	else if(a<=400000)
		sum = 100000*10/100+100000*7.5/100+(a-200000)*5/100;
	else if(a<=600000)
		sum = 100000*10/100+100000*7.5/100+200000*5/100+(a-400000)*3/100;
	else if(a<=1000000)
		sum = 100000*10/100+100000*7.5/100+200000*5/100+200000*3/100+(a-600000)*1.5/100;
	else
		sum = 100000*10/100+100000*7.5/100+200000*5/100+200000*3/100+400000*1.5/100+(a-1000000)*1/100;
	cout<<sum;
	return 0;
}