package main

const (
	LEFT = iota // 0
	RIGHT
)

var directions string
var steps = map[string][]string{}

// one returns the number of steps to reach 'ZZZ'
func one(lines []string) int {
	parselines(lines)

	num := 0
	for i, step := 0, "AAA"; step != "ZZZ"; i, num = i+1, num+1 {
		if i == len(directions) {
			i = 0
		}
		if directions[i] == 'L' {
			step = steps[step][LEFT]
		} else {
			step = steps[step][RIGHT]
		}
	}

	return num
}