golanguk18_code_challenge.go

func calculateHouses(in string) int {
	v := map[int]int{0: 1}
	z := map[rune]int{'<': -1, '>': 1, '^': 99, 'v': -99}
	x := 0

	for _, a := range in {
		x += z[a]
		v[x] = 1
	}

	return len(v)
}