if n == 0 {
		return nil
	}
	p := Peano(makePeano(n - 1))
	return &p
}

var countArg Peano
var countResult int

func countPeano() {
	if countArg == nil {
		countResult = 0
		return
	}
	countArg = *countArg
	countPeano()
	countResult++
}

var s = "(())"
var pT = 0

func p() {
	if pT >= len(s) {
		return
	}
	if s[pT] == '(' {
		pT += 1
		p()