# require "template"
lib C
  fun strtoll(s : UInt8*, p : UInt8**, b : Int32) : Int64
end

class String
  def to_i64
    C.strtoll(self, nil, 10)
  end
end

# require "math/powmod"
struct Int
  def powmod(exp : self, mod : self)
    n = self % mod
    res = typeof(self).new(1)
    while exp > 0
      res = res * n % mod if exp.odd?
      n = n * n % mod
      exp >>= 1
    end
    res
  end
end

n = read_line.to_i64
puts 6i64.powmod(n // 2, 998244353)