#include<stdio.h>
int main()
{
    float i;
    float bonus1,bonus2,bonus4,bonus6,bonus10;
	float bonus=0;
    scanf("%f",&i);
    bonus1=100000*0.1;
    bonus2=bonus1+100000*0.075;
    bonus4=bonus2+200000*0.05;
    bonus6=bonus4+200000*0.03;
    bonus10=bonus6+400000*0.015;
    if(i<=100000)
    {
        bonus=i*0.1;
    }
    else if(i<=200000)
    {
        bonus=bonus1+(i-100000)*0.075;
    }
    else if(i<=400000)
    {
        bonus=bonus2+(i-200000)*0.05;
    }
    else if(i<=600000)
    {
        bonus=bonus4+(i-400000)*0.03;
    }
    else if(i<=1000000)
    {
        bonus=bonus6+(i-600000)*0.015;
    }
    else if(i>1000000)
    {
        bonus=bonus10+(i-1000000)*0.01;
    }
    printf("%.2f",bonus);
	return 0;
}