Not hard today fortunately... https://github.com/genmeblog/advent-of-code/blob/master/src/advent_of_code_2023/day13.clj

I have @U1EP3BZ3Q’s solution working https://squint-cljs.github.io/cherry/?boilerplate=https%3A%2F%2Fgist.githubusercontent.com%2Fborkdude%2Fcf94b492d948f7f418aa81ba54f428ff%2Fraw%2Fa6e9992b079e20e21d753e8c75a7353c5908b225%2Faoc_ui.cljs&repl=true&src=OzsgSGVscGVyIGZ1bmN0aW9uczoKOzsgKGZldGNoLWlucHV0IHllYXIgZGF5KSAtIGdldCBBT0MgaW5wdXQKOzsgKGFwcGVuZCBzdHIpIC0gYXBwZW5kIHN0ciB0byBET00KOzsgKHNweSB4KSAtIGxvZyB4IHRvIGNvbnNvbGUgYW5kIHJldHVybiB4Cgo7OyBSZW1lbWJlciB0byB1cGRhdGUgdGhlIHllYXIgYW5kIGRheSBpbiB0aGUgZmV0Y2gtaW5wdXQgY2FsbC4KKGRlZiBpbnB1dCAoLT4%2BIChqcy1hd2FpdCAoZmV0Y2gtaW5wdXQgMjAyMyAxMykpCiAgICAgICAgICAgICBzdHIvc3BsaXQtbGluZXMpKQoKKGRlZiBkYXRhICh2ZWMgKC0%2BPiAocGFydGl0aW9uLWJ5ICMobm90PSAiIiAlKSBpbnB1dCkKICAgICAgICAgICAgICAgICAocmVtb3ZlICMoPSAiIiAoZmlyc3QgJSkpKSkpKQoKKGRlZm4gZXF1YWw%2FIFtbYSBiXV0gKD0gYSBiKSkKKGRlZm4gbWlycm9yZWQ%2FIFtwYWlyXSAoZXZlcnk%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%2FIGJsb2NrXQogIChvciAoZmluZC1pZCBibG9jayBtPyAxMDApCiAgICAoZmluZC1pZCAoYXBwbHkgbWFwIHZlY3RvciBibG9jaykgbT8gMSkpKQoKKGRlZm4gc29sdXRpb24gW2RhdGEgbT9dCiAgKC0%2BPiAobWFwIChwYXJ0aWFsIGZpbmQtaWQtYWxsIG0%2FKSBkYXRhKQogICAgKHJlZHVjZSArKSkpCgooY29tbWVudAogIDs7IHBhcnQgMQogIChzb2x1dGlvbiBkYXRhIG1pcnJvcmVkPykKICA7OyA9PiAzMTg3NwogIDs7IHBhcnQgMgogIChzb2x1dGlvbiBkYXRhIG1pcnJvcmVkLWJ1dC1vbmU%2FKQogICk%3D - now squint...

here's the https://squint-cljs.github.io/squint/?boilerplate=https%3A%2F%2Fgist.githubusercontent.com%2Fborkdude%2Fcf94b492d948f7f418aa81ba54f428ff%2Fraw%2Fa6e9992b079e20e21d753e8c75a7353c5908b225%2Faoc_ui.cljs&repl=true&src=OzsgSGVscGVyIGZ1bmN0aW9uczoKOzsgKGZldGNoLWlucHV0IHllYXIgZGF5KSAtIGdldCBBT0MgaW5wdXQKOzsgKGFwcGVuZCBzdHIpIC0gYXBwZW5kIHN0ciB0byBET00KOzsgKHNweSB4KSAtIGxvZyB4IHRvIGNvbnNvbGUgYW5kIHJldHVybiB4Cgo7OyBSZW1lbWJlciB0byB1cGRhdGUgdGhlIHllYXIgYW5kIGRheSBpbiB0aGUgZmV0Y2gtaW5wdXQgY2FsbC4KKGRlZiBpbnB1dCAoLT4%2BIChqcy1hd2FpdCAoZmV0Y2gtaW5wdXQgMjAyMyAxMykpCiAgICAgICAgICAgICBzdHIvc3BsaXQtbGluZXMpKQoKKGRlZiBkYXRhICh2ZWMgKC0%2BPiAocGFydGl0aW9uLWJ5ICMobm90PSAiIiAlKSBpbnB1dCkKICAgICAgICAgICAgICAgICAocmVtb3ZlICMoPSAiIiAoZmlyc3QgJSkpKSkpKQoKKGRlZm4gZXF1YWw%2FIFtbYSBiXV0KICAoPSBhIGIpKQooZGVmbiBtaXJyb3JlZD8gW3BhaXJdIChldmVyeT8gZXF1YWw%2FIHBhaXIpKQooZGVmbiBvcnBhaXIgW1thIGJdXSAob3IgYSBiKSkKKGRlZm4gcmV2ZXJzZS1hIFtbYSBiXV0gKG1hcCB2ZWN0b3IgKHJldmVyc2UgYSkgYikpCgooZGVmbiBkaWZmLXN1bSBbW2EgYl1dCiAgKC0%2BPiAobWFwIChmbiBbYzEgYzJdIChpZiAoPSBjMSBjMikgMCAxKSkgYSBiKQogICAgKHJlZHVjZSArKSkpCgooZGVmbiBtaXJyb3JlZC1idXQtb25lPyBbcGFpcl0KICAobGV0IFtjIChtYXAgKGp1eHQgZXF1YWw%2FIGRpZmYtc3VtKSBwYWlyKV0KICAgIChhbmQgKGV2ZXJ5PyBvcnBhaXIgYykKICAgICAgKD0gMSAocmVkdWNlICsgKG1hcCBzZWNvbmQgYykpKSkpKQoKKGRlZm4gaWQtb2YgW2Jsb2NrIG0%2FIHJvd3MgaWRdCiAgKHdoZW4gKC0%2BPiBibG9jayAoc3BsaXQtYXQgaWQpIHJldmVyc2UtYSBtPykKICAgICgqIHJvd3MgaWQpKSkKCihkZWZuIGZpbmQtaWQgW2Jsb2NrIG0%2FIHJvd3NdCiAgKC0%2BPiAoY291bnQgYmxvY2spCiAgICAocmFuZ2UgMSkKICAgIChzb21lIChwYXJ0aWFsIGlkLW9mIGJsb2NrIG0%2FIHJvd3MpKSkpCgooZGVmbiBmaW5kLWlkLWFsbCBbbT8gYmxvY2tdCiAgKG9yIChmaW5kLWlkIGJsb2NrIG0%2FIDEwMCkKICAgIChmaW5kLWlkIChhcHBseSBtYXAgKGNvbXAgc3RyL2pvaW4gdmVjdG9yKSBibG9jaykgbT8gMSkpKQoKKGRlZm4gc29sdXRpb24gW2RhdGEgbT9dCiAgKC0%2BPiAobWFwIChwYXJ0aWFsIGZpbmQtaWQtYWxsIG0%2FKSBkYXRhKQogICAgKHJlZHVjZSArKSkpCgooY29tbWVudAogIDs7IHBhcnQgMQogIChzb2x1dGlvbiBkYXRhIG1pcnJvcmVkPykKICA7OyA9PiAzMTg3NwogIDs7IHBhcnQgMgogIChzb2x1dGlvbiBkYXRhIG1pcnJvcmVkLWJ1dC1vbmU%2FKQogICk%3D - I needed to add a str/join in there since you can't straightly compare arrays with characters in JS :)

(defn find-id-all [m? block]
  (or (find-id block m? 100)
    (find-id (apply map (comp str/join vector) block) m? 1)))

Thanks!

Btw, windows key + enter doesn't work for me on Edge.

can you try:

localStorage.setItem("editor.modifier", "Ctrl")

I should probably switch to Ctrl for the modifier key since Windows/Cmd gives problems on other OSes than mac

Still the same...

Also after refresh? Damn, I should check at home in Windows

yes, after refresh, prv

wait! works on squint but not on cherry

Ah yes makes sense

I haven’t made this tweak in cherry but I’ll just change the default key on non-Mac

https://github.com/erdos/advent-of-code/blob/master/2023/day13.clj I could not yet figure out how to do without loop-recur.

My solution for today, I’m not happy with it https://github.com/zelark/AoC/blob/master/src/zelark/aoc_2023/day_13.clj

@U2E1D7WUB impressed by your solution, so neat and nice!

Same code for both parts: https://github.com/caseneuve/aoc2023/blob/master/day13/solution.clj

I'm stuck on part 2... my answer keeps coming up low.

I'm def overthinking it... looking at other solutions, I'm using 3x (or more) code.

My solution, after some fixes, finally i may share without my shame

(defn errs [a b] (apply + (map #(if (= %1 %2) 0 1) a b)))

(defn refl [c es]
  (->> (range 1 (count c))
       (keep (fn [i] (let [[a b] (split-at i c)]
                       (when (= es (apply + (map errs (reverse a) b))) i))))
       first))

(defn transpose [m] (apply mapv vector m))

(defn task [s es]
  (let [m (str/split-lines s)]
    (or (some-> (refl m es) (* 100)) (refl (transpose m) es))))

(->> (str/split input #"\n\n")
     (map #(-> [(task % 0) (task % 1)]))
     (reduce (partial mapv +) [0 0]))

My https://github.com/wevre/advent-of-code/blob/master/src/advent_of_code/2023/day_13_mirrors.clj. It’s rather bulky. I read the part 1 quickly before going off to a day of meetings and while thinking about it during the day I made a guess what part 2 would be. I was completely wrong. I tried to keep all the info as I went along, none of which I needed, it turned out, for part 2. Oh well. A few tweaks to my logic and both parts run with same code. @U2E1D7WUB I like your stack trick for finding the mirror pair.

https://github.com/bhauman/adv2023/blob/main/src/adv2023/day13/sol.clj

My basic trick was

(let [[a b] (split-at n rows)]  (every? identity (map = (reverse a) b)))

Here’s one from a clojure noob, 100% not clever, I feel lots of attention goes to figuring out the clojure stuff instead of thinking about the actual problem 😞 https://github.com/felixdo/aoc23/blob/main/src/aoc23/day13.clj

Private leaderboards are limited to 200 yeah

(don't care about the ID I just made/wiped it)

Did you irrevocably obliterate it?

It is forever lost to the annals of time

There should be such reflection which covers one side fully. Let c_n is a column. [c1 c2 c3 c3 c2 c1 c0] has a reflection, Full left side is reflected on the right side. Right side contains additional column which can be ignored in reflection.

[c1 c2 c3 c3 c2 c0] has no reflection.

There is no reflection in rows in the first example. Because of that (one side is not fully reflected in the other)

Ok, thanks, got it!