// ConsoleApplication1.cpp: 定义控制台应用程序的入口点。
//

#include<cstdio>
#include<iostream>
#include<cmath>
#include<cstring>
#include<algorithm>
#include<cstdlib>
#include<ctime>
#include<queue>
#include<stack>
#include<vector>
#include<string>

using namespace std;

int main()
{
	int x = 0;
	int sum = 0;
	scanf("%d", &x);
	int tmp = x - 1e6;
	if (tmp > 0)
	{
		sum += tmp * 0.01;
		x = x - tmp;

	}
	else if (x - 6e5 > 0)
	{
		sum += (x - 6e5) * 0.015;
		x = x - (x - 6e5);

	}
	else if (x - 4e5 > 0)
	{
		sum += (x - 4e5) * 0.03;
		x = x - (x - 4e5);

	}
	else if (x - 2e5 > 0)
	{
		sum += (x - 2e5) * 0.05;
		x = x - (x - 2e5);

	}
	else if (x - 1e5 > 0)
	{
		sum += (x - 1e5) * 0.075;
		x = x - (x - 1e5);

	}
	else if (x >= 0)
	{
		sum += (x) * 0.1;

	}
	printf("%d", sum);

	return 0;
}