unittest
{
	assert( [ "725" ].solve == 7 );
	assert( [ "1600" ].solve == 2 );
}



import std.conv;
import std.range;
import std.stdio;

void main()
{
	stdin.byLineCopy.solve.writeln;
}

auto solve( Range )( Range input )
if( isInputRange!Range && is( ElementType!Range == string ) )
{
	auto n = input.front.to!( long );
	
	return 8 - ( n - 400 ) / 200;
}
