package q01

import "strconv"

func solveP2(steps []string) (x int, y int) {
	known := make(map[int]map[int]bool)

	for _, step := range steps {
		dir := step[0]
		amt, _ := strconv.Atoi(step[1:])
		x, y = move(x, y, dir, amt)

		if known[x] == nil {
			known[x] = make(map[int]bool)
		}
		if known[x][y] {
			return
		}
		known[x][y] = true
	}
	return
}