2024 day 2 part 2
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@ -23,6 +23,7 @@
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}
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)
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{safe = true;};
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abs = n: if n > 0 then n else -n;
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countSafety = lib.lists.count (level: level.safe);
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@ -35,4 +36,42 @@
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;
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part1result = getPart1Result content;
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excluding = l: i: let
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len = builtins.length l;
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before = lib.sublist 0 (i) l;
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after = lib.sublist (i + 1) (len - 1) l;
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in before ++ after
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;
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dampLevels = l: let
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len = builtins.length l;
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range = lib.range 0 (len - 1);
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toTest = map (excluding l) range
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;
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in toTest;
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anySafety = builtins.any (level: level.safe);
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dampSafety = level: level
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|> dampLevels
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|> map isSafe
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|> anySafety
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;
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isSafeWithDamp = level:
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( isSafe level ).safe || ( dampSafety level )
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;
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countSafeWithDamp = levels: levels
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|> map isSafeWithDamp
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|> lib.count (a: a == true)
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;
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part2result = content
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|> toLines
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|> toLevels
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|> countSafeWithDamp
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;
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}
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@ -72,4 +72,54 @@ in [
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1 3 6 7 9'';
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})
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])
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(describe "part 2" [
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(it "excludes index" {
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expected = [1 2 4 5];
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actual = example.excluding [1 2 7 4 5] 2;
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})
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(it "gets damp level" {
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expected = [
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[2 7 4 5]
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[1 7 4 5]
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[1 2 4 5]
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[1 2 7 5]
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[1 2 7 4]
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];
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actual = [1 2 7 4 5]
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|> example.dampLevels
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;
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})
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(it "gets damp safety" {
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expected = true;
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actual = example.dampSafety [1 2 7 4 5]
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;
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})
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(it "gets optional damp safety" {
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expected = true;
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actual = example.isSafeWithDamp [1 2 7 4 5]
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;
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})
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(it "counts optional damp safety" {
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expected = 4;
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actual = example.countSafeWithDamp [
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[7 6 4 2 1]
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[1 2 7 8 9]
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[9 7 6 2 1]
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[1 3 2 4 5]
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[8 6 4 4 1]
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[1 3 6 7 9]
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];
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})
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(it "counts optional damp safety from input" {
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expected = 4;
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actual = example.part2result;
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})
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])
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]
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