#include <stdio.h>

int main()
{
	double a;
	scanf("%lf",&a);
	if(a < 100000)
	{
		printf("%g\n",a*0.1);
	}
	else if(a >= 100000 && a < 200000)
	{
		printf("%g\n",a*0.075);
	}
	else if(a > 200000 && a <= 400000)
	{
		printf("%g\n",a*0.05);
	}
	else if(a > 400000 && a <= 600000)
	{
		printf("%g\n",a*0.03);
	}
	else if(a > 600000 && a <= 1000000)
	{
		printf("%g\n",a*0.015);
	}
	else
	{
		printf("%g\n",a*0.001);
	}
	return 0;
}