aoc2023/day-11/two.go

package main

// two returns the sum of all shortest distances between galaxies if space expand by a factor of 1000000
func two(lines []string) int {
	compared := [][]int{}
	sum := 0
	for i := range galaxies {
		for j := range galaxies {
			if i == j || inCompared(i, j, compared) {
				continue
			}

			dist := shortestRoute(galaxies[i].coords, galaxies[j].coords, 1000000)
			compared = append(compared, []int{galaxies[i].identifier, galaxies[j].identifier})
			sum += dist
		}
	}

	return sum
}