From cdf3674e4e837b6646f6367a6b3e9371a49120e1 Mon Sep 17 00:00:00 2001
From: Ben Harris <ben@tilde.team>
Date: Fri, 10 Dec 2021 00:43:57 -0500
Subject: d10p1

---
 aoc2021.test/DayTests.cs |   2 +
 aoc2021/Day10.cs         |  63 +++++++++++++++++++++++++++++
 aoc2021/input/day10.in   | 102 +++++++++++++++++++++++++++++++++++++++++++++++
 aoc2021/input/test10.in  |  10 +++++
 4 files changed, 177 insertions(+)
 create mode 100644 aoc2021/Day10.cs
 create mode 100644 aoc2021/input/day10.in
 create mode 100644 aoc2021/input/test10.in

diff --git a/aoc2021.test/DayTests.cs b/aoc2021.test/DayTests.cs
index 7186a13..51cee5a 100644
--- a/aoc2021.test/DayTests.cs
+++ b/aoc2021.test/DayTests.cs
@@ -13,6 +13,7 @@ public class DayTests
     [DataRow(typeof(Day07), "345035", "97038163")]
     [DataRow(typeof(Day08), "362", "1020159")]
     [DataRow(typeof(Day09), "478", "1327014")]
+    [DataRow(typeof(Day10), "288291", "")]
     public void CheckAllDays(Type dayType, string part1, string part2)
     {
         var s = Stopwatch.StartNew();
@@ -52,6 +53,7 @@ public class DayTests
     [DataRow(typeof(Day07), "37", "168")]
     [DataRow(typeof(Day08), "26", "61229")]
     [DataRow(typeof(Day09), "15", "1134")]
+    [DataRow(typeof(Day10), "26397", "288957")]
     public void CheckTestInputs(Type dayType, string part1, string part2)
     {
         Day.UseTestInput = true;
diff --git a/aoc2021/Day10.cs b/aoc2021/Day10.cs
new file mode 100644
index 0000000..4907a80
--- /dev/null
+++ b/aoc2021/Day10.cs
@@ -0,0 +1,63 @@
+using System.Collections;
+
+namespace aoc2021;
+
+/// <summary>
+/// Day 10: <see href="https://adventofcode.com/2021/day/10"/>
+/// </summary>
+public sealed class Day10 : Day
+{
+    private readonly List<string> _input;
+    private readonly char[] _openers = { '(', '[', '{', '<' };
+    private readonly char[] _closers = { ')', ']', '}', '>' };
+
+    private readonly Dictionary<char, int> _scores = new()
+    {
+        { ')', 3 },
+        { ']', 57 },
+        { '}', 1197 },
+        { '>', 25137 }
+    };
+
+    private readonly Dictionary<char, int> _scoresClosing = new()
+    {
+        { '(', 1 },
+        { '[', 2 },
+        { '{', 3 },
+        { '<', 4 }
+    };
+    
+    public Day10() : base(10, "Syntax Scoring")
+    {
+        _input = Input.ToList();
+    }
+
+    public override string Part1()
+    {
+        var s = new Stack<char>();
+        var score = 0;
+        foreach (var line in _input)
+        {
+            foreach (var c in line)
+            {
+                if (_openers.Contains(c))
+                {
+                    s.Push(c);
+                }
+                else
+                {
+                    var y = s.Pop();
+                    if (Math.Abs(y - c) <= 3) continue;
+                    score += _scores[c];
+                    break;
+                }
+            }
+        }
+
+        return score.ToString();
+    }
+
+    public override string Part2()
+    {
+    }
+}
diff --git a/aoc2021/input/day10.in b/aoc2021/input/day10.in
new file mode 100644
index 0000000..27355e5
--- /dev/null
+++ b/aoc2021/input/day10.in
@@ -0,0 +1,102 @@
+[<[{<[(([<[[{[()()]}]{<<<>[]>[()[]]>{(<>[]){<>[]}}}]<{(<()<>>{()<>})(<()>)}([{()[]}](<()<>>
+<[(<({[<(<<({({}[])[<>]}[<<>{}>[()()]])>>)>]})>{[([({[{{<[[]{}]{{}}><{()[]}[{}]>}}{{[<<>()>((){})
+{<({([<([[<<[(<>())({}{})](<()()>{{}})>(([[]{}]<[][]>){<{}>{<>{}}})>]][[((<[<>()]<<>[]>>{{()[]}{[]{}
+([{({<<{<<<{([{}[]]([]())){[(){}]}}{[<{}()>(<>[])]}][({[()<>][<><>]}{{{}[]}})<<<{}()>>>]>([[<[{}<>]
+{([{({(<{[<(<(()()){{}()}>[(<><>)<<>[]>])[{{{}()}[(){}]}[<()[]>[{}[])]]>{([{{}{}}{[]}][{{}<>}{<><>}]){[[[]()
+[{(([[{([(({(<{}()>({}<>))((()())(<>[]))}{<{{}[]}[{}()]>{{()()})})<{{([]{})[<>[]]}[{<>[]}{
+<<([{{({{{[(<[<>()][()<>]>)]}<(<<<<>()><{}()>>><({{}<>}{()[]}){<(){}>}>)>>})<[{[<([[{}{}]{{}()}]
+<[{{[<[{(<<([([]{})]<[[]{}]{<>()}>)(<<<>{}>{{}[]]>(<[]()>(()[])))><<[{[][]}{[]}](([])([]))><({{}{}}{[][]})
+{{{({{{([<<<{[()]({}{})}((()[])<()<>>)>{{<{}<>><{}()>}}>(<<(())({}())>{{{}}({}())}>{<[{}<>]<{}{}>>[{<>()}
+{<({<[{[<<{{[[[][]][<><>]](([]{})<()[]>)}<<((){})><[[][]](<><>)>>}{(<<{}<>><<>>><((){})([]<>)>)<(([]))(
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+(<{<<[[[(<{<({<>()}{{}<>})<<()()>(<>[])>>(({{}()}([])))}>([[<({}())({}())]((<>{})<<><>>)][[<(
+[([({{{[<([<[(<>[])[{}[]]]<[[]{}][<>]>>])<(((<()<>>(<>{}])({<>{}}[{}<>]))<([()()]{[]<>})({<>()}[{}
+<(<<([{{[<((({<><>}<<>>)[[[]<>]({}())]){(<<>()>{[]()})[<()>{[][]}]})>]<[[[{(<>{})<(){}>}[{<>{}}]]]][
+{[[[{[(((<{[{([]{})[[][]]}(<{}()><<>[]>)][<[<>{}]>]}>({([(()())<[]{}>](([]{})[<>{}])][[{[]{}}<<>{}>]({{}}[<>
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+[{[([([{{{{([(()[])[()()]])[[(<>{})[{}[]]]]}}}{<({[<()[]><{}()]]}{[[[]()]{()()}]})<<<[{}<>](<>[])>[(()<>)([]
+{(<{([<<<((({[{}<>]({}())}))[{{((){})[()()]}<{{}<>}<()[]>>}{{{[]()}}}]){((((()())(())){(<>{}){{
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+{{<[{({([[(([[{}<>][{}<>]][[<><>]]))<([({}()){[]()}](({}())<{}<>>))>]<{<(({}{})[[]<>])[<{}{
+[[({(<[<<{<{<({}())(()[])><((){})[()<>]>}{{<()>(<>[])}}><[([[][]]<()<>>)][<(<>())[()()]>{(<>())}]>)>((<<[
+[([{<<[(([((<<()[]><{}[]>>[{<>()}<()[])]){[{()[]}{<>[]}]{{<>}(()())}})<[(({}{})(()[]))(<[]
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+([<(([[[((<(([<>()]<()<>>)<[[]()][{}()]>){<(()<>){()()}>}>{(<(()()){{}<>}><<[]<>>[(){}]>)[<<{}{}>{[]
+({[<<[{<{<<<[<{}[]>]{[[][]]{[]()}}][{<<><>>(()())}({{}[]}<{}[]>)]>>((([<{}{}>({}())]({{}()
+{{[<<<[{(([<[<(){}><<>[]>]({<>[]}[<>{}])>]([<[[][]][[]{}]>({[]<>}[()<>])]))(([({{}()}{<><>})[[()()](<>[]
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+{{(<<(<([({(({[]{}}{{}[]})<(()())[()()]>)}<{{[{}<>](<>{})}{{{}()}{<>{}}})(({{}{}})(<[][]>{{}()}))>){[<[{<>()}
+[(<{<([[[<({[{<><>}{<>{}}][{()<>}{<>()}]}<(<()[]><()<>>)>)><<([[{}{}]]([<>[]][[]<>]))(<<<>()>[()<>]>
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+{<[([<<[(<{((<{}<>>)(<{}[]>{{}[]}))}(<[<[]()>([]())]{[{}]<<>[]>}><[{{}<>}[{}[]]](([]<>)<{}{}>)>)>){
+[(({<([(<<[<<[[]<>]<()()>>{({})([]{})}>]<[{[<>()]{[]<>}}{{{}<>}<<>()>}]>>>((<{(<<><>>{[]{}})({<>[]}((){
+{[[([[{<<[[[<[<>{}]{<>()}>({{}()}[()<>])]]({{<{}[]><<><>>}{<()<>>}}{{{[]()}<()<>>}<(<>[])(()[])>}
+{<{<{{{{[[[((<{}{}>{{}{}})<{{}{}}{(){}}>)[[(()<>)]]]({{([]())[<>[]]}}[{<[]<>>((){})}([[]<>])])]
+<[({({[[<(<({([]<>)[<>]}[[()[]]([])])<(<(){}>(()[]))[<<>()>[[]{}]]>>>><{[{<[{}{}][{}()]>{([]())[<><>]}}<{<<
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+[<[<[(((<(({{([][])}}<[[[][]]{(){}}>(<()[]>[[][]])>){([(()<>)<()()>]<[{}()]([]())>)<<{<>()}>([<>[]]{[]
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+[<<<[{[<{[(({([][]){<>}}))(<{([]())[{}()]}[[{}[]]{[]<>}]><{(<>())<[][]>}[([][]){{}()}]>)](
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+[({{{((<{<{[<<{}{}>><<[]{}><<>{}>>][<{{}()}>]}[(<[[]]<<>[]>>[([]())<<>{}>]){<[{}[]]>((()<>)[[]{}
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+{([<[{{{<[{[({<>()}(<>{})}[{()()}[<><>]]]}<{{{<>[]}[{}[]]}({[]()}[{}()])}<({()()}<<><>>){{{}{}}
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+<({<[([{[[<{<{[]{}}[<>]>}>([(<()[]>[[]<>])<{<>[]}>]{[(()())[{}]][<{}<>><{}>]})]]([{{{([]{})[(){}]}[<
+[<<[{[{{[[{[[[()<>][()[]]](({}<>)[()<>])]<<(()[])>([<>[]]{()<>})>}([<[{}{}]>{({}<>){[][]}}][{[<>[]][<>]}])]]}
diff --git a/aoc2021/input/test10.in b/aoc2021/input/test10.in
new file mode 100644
index 0000000..4861500
--- /dev/null
+++ b/aoc2021/input/test10.in
@@ -0,0 +1,10 @@
+[({(<(())[]>[[{[]{<()<>>
+[(()[<>])]({[<{<<[]>>(
+{([(<{}[<>[]}>{[]{[(<()>
+(((({<>}<{<{<>}{[]{[]{}
+[[<[([]))<([[{}[[()]]]
+[{[{({}]{}}([{[{{{}}([]
+{<[[]]>}<{[{[{[]{()[[[]
+[<(<(<(<{}))><([]([]()
+<{([([[(<>()){}]>(<<{{
+<{([{{}}[<[[[<>{}]]]>[]]
\ No newline at end of file
-- 
cgit 1.4.1