code: func MaxInt64N(v ...int64) int64 {
  	switch len(v) {
  	case 0:
  		return 0
  	case 1:
  		return v[0]
  	case 2:
  		return MaxInt64(v[0], v[1])
  	default:
  		l := len(v) / 2
  		return MaxInt64N(MaxInt64N(v[:l]...), MaxInt64N(v[l:]...))
  	}
  }
docs: // MaxInt64N returns the largest int64 in the set provided.
  // If no values are provided, MaxInt64 returns 0.