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Day 10 solution

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I actually feel pretty good about this one.
This commit is contained in:
Chris Pickett
2021-12-09 23:23:49 -06:00
parent 2c224483b4
commit 55b385f779
4 changed files with 259 additions and 1 deletions
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3
advent-of-code-2021.csproj
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@ -42,6 +42,9 @@
<None Update="inputs\09.txt">
<CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
</None>
<None Update="inputs\10.txt">
<CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
</None>
</ItemGroup>
</Project>

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inputs/10.txt Normal file
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{{<{{{{([{[([[()<>]{<>{}}]<([]())(()<>)>)((({}())[()[]])<<[][]>[{}[]]>)]{{(<{}<>>{<><>}]([<>[]]<
[(<{{[{(<({{<<[]()><<>{}>>([<>[]]{<><>})}})>)}]}}>[{(<{({[{[[({}())((){})]({{}[]})]<<[<>{}]([][])>({<>()}
(({<{[{({(([[([]())({}())]]({[[]{}]([][]))<((){})<{}<>>>))[(([<>[]]<[]>)(([]{}){{}{}}))])})[({<[{
([{{[([<({<<<([]())[()[]]>{<()[]>[[]()]}>[{<[]{}><[]>>{<<>()>{[]()}}]>[[[[[]{}]([]<>)]<{<>{}}
[[((<({<(<{<<{{}()}{[][]}>[((){})]>}>{((<({}<>)<{}()>>[[<>()]])<<<[][]><<>[]>>{<{}[]>(<>())}>)<{[[{
[{<{{{{<([{[(<[]<>>(<>[])){({}<>)([]<>)}]{{([][])[<>{}]}{<[]<>>(<>{})}}}])<<{[<[<>{}]<(){}>>{<{}<>><<>
(({({([(<[[([[{}{}]([]<>}][(<>()){(){}}])]](({{{{}<>}<{}[]>}([{}[]][(){}])}[(<[]{}>({}()))<<<><>>>])<[{
[{<((<{(<{<<{[()()](()<>)}<({}[])([]<>)>>{(<<><>>[[]{}])[[[]()](<>[])]}>{[[({}<>)([]<>)][[{}[]
{<{<{{(<[[{[[({}[])[()[]]]([()<>][{}[]])]<<({}())[{}{}]><[<>[]](<><>)>>}(([([]{})((){})]((<>)([]{}))))]<{<<<
<{(<<(<[<{<[{[<>[]][{}{}]}{{()<>}{<><>}>]>[<(([]{})[[]])>]}<[<([{}{}][<><>]){([]{})}>]({<{<>()}>{
{[[<{{{<<<[<((()<>)({}{}))<{{}()}>>]<((([]{}){{}<>})[{{}<>}([]{})])({{()[]}[[]()]}[{{}()}({
<[[[{{([{[({[<{}[]>[{}()]]{<()>}}({<()()>}<<<>()>{[]}>))]((({({}[])>{[(){}]{<><>}})(({()[]}[()<>]
[([([([<[{{<[[{}[]]{<>{}}][<{}>(()[])]>[({<>()}(()[])){<[][]>{()[]}}]}}<{(({()}([]()))(([]())<()[]>))<((<>{}
<{[{(({([([[{((){})[[]]>{{{}[]}[<>()]}]])]{([([<[]{}>((){})]<[()<>]<()()>>)][<<{<>{}}{<><>
[[{{(([{(({[[{{}[]}]][<<<>()>({}{})>[[{}<>]{{}<>}]]}[(({{}}{[][]}){[{}{}][<>[]]})(<<<>{}><<><>>>)])<[
[[{([<<([[<(<{<>()}<[][]>>{[<>[]]{()[]}}){[<[][]><{}()>][([]())<<><>>]}>]((<<[(){}][(){}]><([])>>))
[{[<{(([(([([(<>[]}(<>{})][<{}[]>[()[]]])<{[{}<>]<[]<>>}{{[]<>}{{}{}}}>]<<{[<>{}](<>())}{{()[]}{<>{}}}>[
{({<[(((<{<<[[()<>]]<({}<>)>>>[<({[]<>}{()<>})[[()<>][<><>]]>({[{}[]]({}<>)}[<(){}>(<>())])]}><[{<[[<>
<(((({{(<({[<<[]<>>>([()()]{<>()})][<[{}{}]{<>()}>{{{}{}}[[][]]}]}{(<<<><>>(()<>)>(<<>()>[()[]]))
[<{{[{[[[<(({<()()>[(){}]}[([]())[(){}]]))>{[<[[[]]<[][]>]{[[][]](()())}>[(<<>()>{[]<>})(({}())<{}[]>)
(<[[((<<({[(([()[]]([]<>)){{(){}}})]{<(<<><>><[]{}>)<<{}<>]([]<>)>>}}){(<{<{[]{}}[{}<>]>}>{({(<><>)<()[]>}{((
{[{((<{<<<<([<[]{}>[[][]]]<[[]()][<>[]]>)[[<{}[]>{{}()}](<()<>>[<>[]])]>>[{([<()[]>{{}[]}](({}{}
(<([<((<{[<<(((){})<<><>>)<[{}()]<[]<>>}>[([[]{}](()[]))]>[<{({}()){{}()}}>[(([]<>)({}[])){
{((((<(({[(<{<()]([][])}>){[<[[][]]>]<{{{}<>}[[][]]}>}]}[<{([{[]{}}]{[(){}]<<>()>})[(<()<>>{()<>
<<{([{<[[[<{([[]<>]){[<>()][(){}]}}[{(()[])[()[]]}]>][{{[{{}[]}<()<>>]>[[{(){}}[<>[]]][[<>[]]({}()
<((<[<(([<[{({<><>}(()[]))}]<[<[{}()]<()[]>>(<()()>)][[(<>())<()())]<{<>}<{}>>]>>({{<<<>[]><<>(
[({{{{{{(([[<<()()><<>[]>>[{[]<>}]]{(<{}<>>(()[]))<<[][]>(()())>}]([<({}()><[][]>>]<{[[][]]<[]<>>}(
(<(<{{<[{{{[<[<>[]]<[]{}>>[{<>{}}{()()}]]{<<{}()>(<>())>[[{}[]]]}}}}][{([{[([]{})<()[]>][[<>{}]{()[]}]}(([()
{[<<(<<<{[<<<<[]<>><()[]>>[({}[])[[]<>]]><((<><>)[{}<>])[{{}{}}[[]()]]>>{{{[<><>]<<>()>}[<[]{}>([][])]
<(<{<(<({[[{((()[])[{}<>])([<>()]>}{[({}{})[(){}]]<[()<>]({}[])>}]{[<{[]{}}><{[]{}}[[][]]>][[<{}<>><()[]>]<[
{<({[<((<<<{{([]<>}{<><>}}<{<>{}}[[]<>]>}>{<[{{}}(()())]>}>(<<{[(){}]<()[]>}({(){}}[()<>])>[<<<>[]>{[]
{(({<{{{{{((<{[]<>>(<>{})>[[<>()]])<<(()())[<>]><[(){}][{}{}]>>)}({([[[]]]{<{}{}><()[]>})<{[(){}][[]()]}>
<<[<<[((({[[(<{}[]>({}())){[()()]}][{{<>{}}<<>()>}[<{}[]>[<>[]]]]]{<(([]())([]()))>{([()()]<<>[]>)[<
{([<<<({((<{{[<>[]][<>{}]}<<<>[]>[[][]]>}[{[()[]]<<>[]>}<[{}{}]<<><>>>]>({[<[]<>>]<<()()>([][])>}(((<
(<{<((<{[[<[(<[]{}>{<>{}})][<([][])[{}<>]>[<{}<>>]]><<[(<>[])[{}<>]]{<{}{}><{}[]>}>(<([]<>){()[]}>)>]]}{({[<(
[{{(({<<<<{{<({}()){{}{}}>[(()[])]}[([(){}]{<>[]})[(<>())[{}]]]}>[<<<{[]{}}{{}{}}>]{<[{}<>]>{(()())}}>[{(<[]<
{[<<{<[[({{<<{()[]}<<><>>>([[]<>>[{}[]])>}[[[([]<>)[<>{}]]]<<[<>()](<>{})>>]})(((({({}[])<<><>>}([<>])))((<
[{(({({<({(<{{[][]}({}<>)}[{()()}{[][]}]>(((<><>)(<>()))([{}()][{}()])))([{[[]()]<[]{}>}{(
{<{{<[<<[(<([({}())[{}()]]{{{}<>}<[]>}){[((){})<[][]>]<([]())({}[])>}>{<(((){})[()<>])(<()[]>[(){}]
{({({<{{(<([<[<><>]((){})>{{()[]}<<>{}>}]{[(<>())<{}[]>][{()<>}[[]()]>})>[[<{([])[()[]]}><<[(){}]({}())>>]{
(<{{(<<<{(<(({<><>}{()[]})<[{}[]]([]())>)([(()<>)[[]<>]]({[]()}{{}{}}))))[(<{{()[]}<()[]>}((<><>))>[[
<<[<([{<<[[({<[]<>><<>()>}{([]<>)[[]<>]}){[<{}{}><()[]>]<{<>()}{<>()}>}]{{<({}{})>})]>[<({<
(<<[[({[({(<{{[]{}}<[]{}}}>[<<()<>><{}<>>>(<()()>{{}<>})])}{<({({}[])<()>}<([]())<{}<>>>)<<[(
[<(<{(([(<([[<<>{}>(<>{})]](((()[])[[]()])[[{}<>]({}{})]))><<{<([]<>){[][]}>[{<>[]}<()<>>]}>(<((<>[]){()<>}
[<{[[{(([[{[{<[]<>>(<>[])}<<<>()>{{}{}}>][({[][]}<<>>){(<>[])[<><>]}]}(([([][])(<>[])]{(()())}))](<<{
((<{<<([<[(([{()()}((){})][<()[]><()[]>])<{({}<>){{}<>}}>)[{(<<><>>)<{{}[]}>}({(<>()){()}}{([
[({{{{((([({{(<>[])[[]<>]}([{}])}(({<><>}{<>()})[[{}[]]]))<{[[<>{}](()[])](<()<>>{[]()})}{{<()()
[<[<({[[({[[[<<>[]>]({[]}[<><>])]{[[()<>]([]())]<({}{})[[][]]>}]}<<(([()()]<()<>>)<{()()}[()[]]>
{<([[<[<<(([<(()[])(()<>)>{[<><>](<>[])]]{({{}})}){<((<><>)<{}<>>)((()[])[[]()])>})<<(<(())(
<[<((<{(<[[({{{}()}({}{})}}<[[()<>]]<[()()][<>]>>]<[([()()]({}<>))[<{}()>([]<>)]]>][{[[(()())[()]][[<>[]
[{(<(<[((<{(({(){}}[()[]])<{[][]}(<>{})>)[(<<><>>[()[]]]{[{}[]]{()<>}}]}><[<[[{}()](()[])][(<>()){<>()}]>[{
([({<({{{[[<[{{}<>}([][])]{[(){}]{()<>}}>][{[{[]<>}][<{}()>]}]]}{((<[{{}[]}(()()))[{<>[]}]>({(<>{})<[]<>>}
{[({[<[([(<{((<>{})<{}{}>)}(<[[]()]<{}{}>>({{}[]}{[]<>}))><[((()[])(())){([]<>)[()[]]}]<({()
[(<<<([{[[[<<<<>>{{}<>}>[{[]()}]>[([[]{}]{[]<>}){[<>()]}]]]]}]<<((<([{[][]}<{}<>>]<[[]{}][[]<>])){{[<>[]
{[{{[[{{[<[<<{{}<>}<[]{}>><<()[]>[<>[]]>>[([<>{}](()()))]]>{({([{}[]](<><>))<<(){}>(<>{})>}({([]<>)[{}[])}(<<
<{([[{<[<{{([(<>{})[<>()]]){{[()[]]([])}}}[{<((){})([]())>}(<{[][]}<<>{}>>[[[][]]<()()>])]}>[
{(<[({{(<<<{[(()())]<[<>[]][{}{}]>}[[<()[]>{[][]}]]>(<((<>())[()[]]){{()[]}{[][]}}>({{[]<>}<[][]>}(<[]{}
<{{[{((((<[{({[]{}}<(){}>)}[[{[][]}<<>{}>]<<[][]>{[]}>]]>{{([((){})<<>{}>]{{()()}})<[<<>()>](<<>>[()
<([({(<<<{[<{(()<>)(<>[])}([<>]{<>{}})>]<(<<<><>><{}()>>[([][]){[]<>}])>}{[([[[]<>]{(){}}]<[{}<>]{{}<>}
{<<<[{[(<[([([[]()]<()[]>)(([]())({}[]))]<[[()<>]]<[(){}]<[][]>>>)(<{<[][]>)<(()<>)<{}[]>>
{[[<[[<(<[[{(<()<>>)<{{}<>}[[][]]>}<<(()()){[]{}}>{<[]()>>>]]>)({<<<<[{}{}]{<>()}>{<<><>>([]{})}>>[([<()()>(
[[[{({{({[{[(({}())(<>[]))<<<>[]>[[]<>]>]<<<()()><<>>>[({}())(<>[])]>}[({<(){}>({}{})}[[{}()]]){[[[]<>
<(((<<[{[[<({({}<>)[{}()]}[{[]{}}([]())]){([[]<>]<[]<>>)[(()[])[{}[]]]}>(<<<{}[]><()[]>)>[[<{}(
[<<{[{{<<[[{<<()[]>(())><<{}()][<>()]>}({[{}{}][<>()]}<([]())([])>)]({{{[][]}[<>{}]}<[()]{{}()}>}(({
{([(<[[<(<<<(<<><>><{}<>>)({{}()}[<>()])>{([(){}][[][]]){[<><>]{<><>}}}>>(({(<<><>><()<>>){{()<>}{(){}}}}
[(<([[[([(({[[<>[]]]}))([{{[{}()]([]<>)}{{<>[]}[[][]]}}(<([]())>[([]{}){()<>}])][<{<()[]><()()>}>{<([
{([[<<[[<[[[<[{}[]]{[]<>}>[<{}()>{<>[]}]]]<[<{[][]}(<>[])>[[{}[]]<[][]>]][((()[])[<>{}]){{{}()}[(){}]}]>]>
{[[[<<{{[<<<([{}[]]<<>[]>)([()]<{}{}>)>({<<>{}>(()[])})>[(((<><>>{<>{}})<<<>[]>[[]()]>)({(()(
[[[{<<(({{[((<{}<>>[{}])({<>{}}<{}{}>))[(<{}()>(<>{}))(<<><>>{{}{}})]]({{<()>}}(<{(){}](<><>)
(({{[[[<[{<{[<{}()><<>{}>]}({[[]()]<{}[]>])>}[<{{(<><>)<{}()>}{{{}<>}{{}[]}}}(([<>[]]([][]))
<[<<{({[(<(<{({}<>)<[][]>}{(()[])({}[])}>{(<{}{}>>})>([<<<<>{}>((){})>[(()())[[]()]]><{[{}<>]<<>
[{<{[(<[[[{({({}<>)(()<>)}{<[][]>})}{[<[()[]]{[]<>]>{<{}()>(()())}]{[<()()>{<>[]}]<[<><>]>}}]
({{<{[[[([({{<<>()>(()<>)}(<{}()><()[]>)}<[[{}()]<{}[]>]{((){}){{}[]}}>)[([{<><>}<()<>>][(<><>)(()())]
(({<{{{[([{<<<{}{}>{[]{}}>([<>[]]{[]{}})>}{<<{[]{}}[[]{}]>{<<>{}>([]())}><(<(){}>({}[]))[(<>[])(()<>)]>
<[<(<{[[<([({[<>()][<>{}]}{{()()}[<><>]})]<[[<[]()>]<[{}<>]([])>]{<[<>[]]<<>()>]((<>())[<>{}])}>)([{<[[][]]
<<{{((({<<[[<{<>()}(()())>[(()[])[()<>]]]{({{}[]}[<><>])}]<{<<<><>>{{}[]}>}<[<[][]>[{}[]]](<()()>{[]{}})
[<<{<{([{(({[{()[]}{()}][({}{})(()[])]}{({<>()})({[]()}({}[]))}))}][[[([[{<>[]}[{}[]]][[<><>]<()[]>]]([
[([[{{<(<[{(<<()<>>><[[]()]{()()}>)<(({}()){[]<>})>}]>)>{<[<{{((()())({}<>)>{([]{}){{}<>}}}}<({
((<<{(<[(<[[<({})>[{[][]}[<>[]]]]]>)]>)}([(<[[([(([][]))[{{}()}([][])]][((<><>){[]()})])]]<<(
<<<<(<{[{[({<{(){}}[<>]>[<[]<>>{<>()}]}[<[<>()]>{[[]<>][{}[]}}])(<{<(){}>[{}{}]}<(()<>)<()[]>>>)][<{{<[]<
(([[<{[({{{[<<<><>>(()())>({[]<>}(<>()))]{<[<>()][{}{}]>([[]()]((){}))}}((<({}{})[<>]>([<>()]{(){}})))}[<{([<
{[([<<[([[<[(<[]()>{()[]})<{<>()}{(){}}>]><<{<[][]><{}()>}(<[]<>>([]<>])>>]{[[<<{}<>>({}[]
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[{{[<{<<{{<[<<()()>[{}]>([{}{}]({}{}))]{(<[][]>([][]))(([]{})<<>[]>)}>}({{<{<>[]}[<>()]>(({
[<{[(<<[<<(([[<>[]]][([]())({}<>}])){(({[]()}{()<>})[<[]{}>(<><>)])[<[{}[]][{}{}]><{(){}}<{}{}>>]}>({<<[[]()
[({[<<<({<({({{}<>}[[]{}])}({({}<>)<<>[]>}))([<{(){}}>])>}{<{[[{{}{}}(<>{})]]<[[()[]]<<><>>]{[<><>]<{}()>
[<{<<<<(([([[{{}()}[<>]][((){})[[]{}]]](({[]()}[[]()])[{[]()}(<>[])])){[{<<><>>{{}<>}}<{()[]}[[]
[{({<(((<({{({[]()}))[((()())<[][]>)<{<>{}}(<><>)>]}{[<[[][]](<><>)>][[{<>{}}[<>{}]](<<>[]>{[][]})]})>)))>}
[[{[[{({[([(<<<>[]>[<><>]>([{}()][<>()]))<<[<>{}]{{}<>}>[<<>{}>([]{}]]>])<(<(<[]()>)[(()[])
<([(<<[<<({{{([]{})}[{()<>}<[]()>]}}{(<{[]{}}([][])>)})[[[<[[][]]<<><>>><{{}{}}(<><>)>]<<(()())[(){}]>{
[(<{[{({[({<{<{}[]><<>()>}{<{}()>[[][]]}><<{{}()}{(){}}>>}[<{{<>{}}{()())}>]){[<[{()()}<[]()>]><[[{
<{<[{([([<<[<[<>()]{(){}}>][({{}[]}((){}))[<[][]><()<>>]]>>{{{<{<><>}{(){}}>({<><>}<()))}({<()><{}[]>}(<(
({((([[{([<[(([]{})){[()<>][<><>]}]>{[<<{}{}><()[]>>(<<>>)]({<<><>>[<>{}]}{<[]{}><<>{}>})}])[(<(([<><>][{}{
<[<(([(({([[<(()[])[[]{}]>{<<>{}>(<>{})}]]([([<>{}]{[]{}})][{<()>{()[]}}(({}[])(<>[]))]))})({{[(({(){}}[<>

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src/10.cs Normal file
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@ -0,0 +1,160 @@
namespace aoc2021
{
internal class Day10
{
internal static void Go()
{
Logger.Log("Day 10");
Logger.Log("-----");
var lines = File.ReadAllLines("inputs/10.txt");
Part1(lines);
Part2(lines);
Logger.Log("");
}
private static void Part1(IEnumerable<string> lines)
{
Dictionary<char, int> charVals = new()
{
{ ')', 3 },
{ ']', 57 },
{ '}', 1197 },
{ '>', 25137 },
};
using var t = new Timer();
long score = 0;
foreach (var line in lines)
{
var (corrupted, ch) = IsCorrupted(line);
if (corrupted)
{
score += charVals[ch];
}
}
Logger.Log($"part1: {score}");
}
private static (bool, char) IsCorrupted(string line)
{
var s = new Stack<char>();
foreach (var ch in line)
{
switch (ch)
{
case '(':
case '[':
case '{':
case '<':
s.Push(ch);
break;
case ')':
case ']':
case '}':
case '>':
var popped = s.Pop();
if (ch == ')' && popped != '('
|| ch == ']' && popped != '['
|| ch == '}' && popped != '{'
|| ch == '>' && popped != '<')
{
return (true, ch);
}
break;
default:
throw new Exception();
}
}
return (false, '\0');
}
private static void Part2(IEnumerable<string> lines)
{
Dictionary<char, int> charVals = new()
{
{ '(', 1 },
{ '[', 2 },
{ '{', 3 },
{ '<', 4 },
};
using var t = new Timer();
List<long> scores = new();
foreach (var line in lines)
{
var (corrupted, _) = IsCorrupted(line);
if (corrupted)
{
continue;
}
var s = new Stack<char>();
foreach (var ch in line)
{
switch (ch)
{
case '(':
case '[':
case '{':
case '<':
s.Push(ch);
break;
case ')':
case ']':
case '}':
case '>':
s.Pop();
break;
default:
throw new Exception();
}
}
long score = 0;
while (s.Count > 0)
{
var ch = s.Pop();
if (ch == '(')
{
score *= 5;
score += charVals[ch];
}
else if (ch == '[')
{
score *= 5;
score += charVals[ch];
}
else if (ch == '{')
{
score *= 5;
score += charVals[ch];
}
else if (ch == '<')
{
score *= 5;
score += charVals[ch];
}
}
scores.Add(score);
}
if (scores.Count % 2 == 0)
{
throw new Exception();
}
var final = scores.OrderBy(x => x).Skip((int)Math.Floor(scores.Count / 2.0)).First();
Logger.Log($"part2: {final}");
}
}
}

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src/main.cs
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@ -4,4 +4,5 @@
//aoc2021.Day06.Go();
//aoc2021.Day07.Go();
//aoc2021.Day08.Go();
aoc2021.Day09.Go();
//aoc2021.Day09.Go();
aoc2021.Day10.Go();