Grimmauld/Advent-of-Nix-2024
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

fmt

Browse source
This commit is contained in:
Grimmauld 2024-12-02 10:05:27 +01:00
parent bb768f9ae5
commit 315d8a4aa3
Signed by: Grimmauld
SSH key fingerprint: SHA256:Q8IL6Y7sSKqzkyFdV1L0O/EflEh1fFV3tBtwxpapRH4
2 changed files with 15 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

17
day2/default.nix
View file

@ -4,9 +4,20 @@ with builtins;
with utils; with utils;
let let
records = map (l: map toInt (splitWhitespace l)) (readLines ./input); records = map (l: map toInt (splitWhitespace l)) (readLines ./input);
getMaxDelta = l: (foldl' (prev: value: { inherit value; maxDelta = max prev.maxDelta (delta prev.value value); } ) { value = head l; maxDelta = 0; } l).maxDelta; getMaxDelta = l:
isSafe = r: let sorted = sort lessThan r; in (r == sorted || r == (reverseList sorted)) && allUnique r && (3 >= getMaxDelta r); (foldl' (prev: value: {
isSafeDampened = r: any isSafe ([ r ] ++ (map (deleteAt r) (range 0 (length r)))); inherit value;
maxDelta = max prev.maxDelta (delta prev.value value);
}) {
value = head l;
maxDelta = 0;
} l).maxDelta;
isSafe = r:
let sorted = sort lessThan r;
in (r == sorted || r == (reverseList sorted)) && allUnique r
&& (3 >= getMaxDelta r);
isSafeDampened = r:
any isSafe ([ r ] ++ (map (deleteAt r) (range 0 (length r))));
in { in {
part1 = count isSafe records; part1 = count isSafe records;
part2 = count isSafeDampened records; part2 = count isSafeDampened records;