diff options
Diffstat (limited to 'AoC2022/03/solver.el')
| -rw-r--r-- | AoC2022/03/solver.el | 41 |
1 files changed, 27 insertions, 14 deletions
diff --git a/AoC2022/03/solver.el b/AoC2022/03/solver.el index d2c7c05..355ddf7 100644 --- a/AoC2022/03/solver.el +++ b/AoC2022/03/solver.el @@ -14,7 +14,7 @@ ;; Day 03 ;; ;;; Code: - +(require 'subr-x) (defsubst solver-recover-value (cross) (let ((result 0)) (while (= 0 (logand cross 1)) @@ -50,17 +50,30 @@ (should (= 19 (solver-line-priority "hMHLcmGLMLhHmsRMsSvsQSqrsrlJTTdV" ))) (should (= 20 (solver-line-priority "ttgJtRGJQctTZtZT")))) -(ert-deftest test-problems () - (should (= 8072 - (with-temp-buffer - ;; (insert "vJrwpWtwJgWrhcsFMMfFFhFp") - (insert-file-contents "input") - (goto-char (point-min)) - (let ((result 0)) - (while (not (eobp)) - (cl-incf result (solver-line-priority - (buffer-substring-no-properties - (line-beginning-position) (line-end-position)))) - (forward-line)) - result))))) +(defsubst solver-badge (packs) + (seq-reduce (lambda (acc item) + (logior acc (ash 1 (- item 64)))) + packs 0)) + +(defun solver-badge-priority (group-packs) + (thread-last group-packs + (split-string) + (mapcar #'solver-badge) + (apply #'logand) + (solver-recover-value) + (solver-to-priority))) +(defun solver (task lines) + (with-temp-buffer + (insert-file-contents "input") + (goto-char (point-min)) + (cl-loop while (not (eobp)) + sum + (funcall task + (buffer-substring-no-properties (point) + (line-end-position lines))) + do (forward-line lines)))) + +(ert-deftest test-problems () + (should (= 8072 (solver #'solver-line-priority 1))) + (should (= 2567 (solver #'solver-badge-priority 3)))) |