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Reduce part 2 to O(n)

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Bert Peters
2024-12-01 18:04:13 +01:00
parent f4a5ffe3ce
commit 443ff2cee6
1 changed files with 3 additions and 1 deletions
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4
2024/bonus/day01/main.tf
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@@ -14,7 +14,9 @@ locals {
diffs = [for i in range(length(local.left_sorted)): abs(local.left_sorted[i] - local.right_sorted[i])]
matching = [for left in local.left: sum([for right in local.right: left == right ? left : 0])]
counts = {for num in local.right: num => num...}
matching = [for left in local.left: left * length(lookup(local.counts, left, []))]
}
output "part1" {