func readInt() -> Int {
    return Int(readLine()!)!
}

func mainA() {
    let X = readInt()

    switch X {
    case 400...599:
        print(8)
    case 600...799:
        print(7)
    case 800...999:
        print(6)
    case 1000...1199:
        print(5)
    case 1200...1399:
        print(4)
    case 1400...1599:
        print(3)
    case 1600...1799:
        print(2)
    case 1800...1999:
        print(1)
    default:
        fatalError()
    }
}

mainA()