import std;

alias sread = () => readln.chomp();
alias lread = () => readln.chomp.to!long();
alias aryread(T = long) = () => readln.split.to!(T[]);
//aryread!string();
void main()
{
    auto x = lread();
    if ((400 <= x) && (x <= 599))
    {
        writeln(8);

    }
    else if ((600 <= x) && (x <= 799))
    {
        writeln(7);

    }
    else if ((800 <= x) && (x <= 999))
    {
        writeln(6);

    }
    else if ((1000 <= x) && (x <= 1199))
    {
        writeln(5);
    }
    else if ((1200 <= x) && (x <= 1399))
    {
        writeln(4);
    }
    else if ((1400 <= x) && (x <= 1599))
    {
        writeln(3);
    }
    else if ((1600 <= x) && (x <= 1799))
    {
        writeln(2);
    }
    else if ((1800 <= x) && (x <= 1999))
    {
        writeln(1);
    }
}

void scan(L...)(ref L A)
{
    auto l = readln.split;
    foreach (i, T; L)
    {
        A[i] = l[i].to!T;
    }
}

void arywrite(T)(T a)
{
    a.map!text.join(' ').writeln;
}
