# include <bits/stdc++.h>
using namespace std;

int main(){
	int a;
	cin>>a;
	int sum =0;
	
	if(a<=100000) sum+=a*0.1; 
	else{
		if(a<=200000) sum+=(a-100000)+0.075;
		else{
			if(a<=400000) sum+=(a-200000)+0.05;
			else{
				if(a<=600000) sum+=(a-400000)+0.03;
				else{
					if(a<=1000000) sum+=(a-600000)+0.015;
					else sum+=(a-1000000)+0.01;
				}
			}
		}
	}
	
	cout<<sum;
	return 0;
}