＿ = len
〇 = print
λ = lambda ξ: ξ[＿(ξ)//2]
Σ = lambda Ξ, μ: [ζ for ζ in Ξ if μ(ζ)]

def 卍(Ψ):
    return Ψ if ＿(Ψ) <= 1 else 卍(Σ(Ψ, lambda ζ: ζ < λ(Ψ))) + Σ(Ψ, lambda ζ: ζ == λ(Ψ)) + 卍(Σ(Ψ, lambda ζ: ζ > λ(Ψ)))

? = [3,6,8,10,1,2,1]
〇("前:", ?)
? = 卍(?)
〇("后:", ?)
--
FROM 125.86.90.*