From 9c337c1a9aa2df421a0232e9b09834dd141e8683 Mon Sep 17 00:00:00 2001
From: ptrcnull <git@ptrcnull.me>
Date: Fri, 10 Dec 2021 07:26:12 +0100
Subject: [PATCH] 10: part1+2

---
 10/input     | 90 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 10/solve.zig | 87 ++++++++++++++++++++++++++++++++++++++++++++++++++
 10/testinput | 10 ++++++
 3 files changed, 187 insertions(+)
 create mode 100644 10/input
 create mode 100644 10/solve.zig
 create mode 100644 10/testinput

diff --git a/10/input b/10/input
new file mode 100644
index 0000000..6b75869
--- /dev/null
+++ b/10/input
@@ -0,0 +1,90 @@
+({[[{{({<<<<(<{}()><()[]>)[([]{}){<>[]}]><[{<>()}{<><>}]<(()[])([]<>)>>>){<([(())<()<>>][{{}{}}[(){
+({{<{<<(([({<[[]()]<()<>>>{(()())(<>())}}[{[(){}]}(<{}[]>[<>])])<[[[{}()](<>{})]]<<{{}()}[<>]>[({})[{}()]]>>
+<[<{{<<{[{{([(())<{}{}>][{<><>}(<><>)])}}]((<(<{[]<>}>(<()()>[[]()]))>))}([(<<({[]()})>(({[][]}([]{})){(()()
+({<{{{{<<{([{[<>()][<>()]}[((){})([]())]])[[<[()()]<()<>>>[{<>()}{(){}}]][[{<>{}}[{}[]]][([]())[{}()
+[((<[[{<[<{[<[<>[]]<(){}>><(()[])(()())>]((<<>{}>[<><>]){[()<>]{{}<>}})}>]<<[<[<()()>](({}{})(
+[{{([([[<([[<[()()][()<>]>][<<{}{}>[<>{}]>(((){}){[][]})]][<[<()()><{}()>](<<><>><[]{}>)><<<<>()><{}<>>>(([](
+<{[{(<{<[[{{{[[]{}]<{}<>>>{{{}()}<[]<>>}}([(()[])]{[{}<>][<>()]})}((<(<>{})<<>[]>>[[{}[]][{}{}]])
+[<[<(<{[<([({(<>())[{}()]}[[<><>]])]){<{(((){})[{}<>])<<<>[]>(()[])>}(<([]{})<<>[]>><[{}<>][{}()]>)><<({(
+(([{[<[{{[<[{{{}{}}<[]{}>}[[{}{}]{(){}}]][(<{}()>([][])){<<><>>({}[])}]>[(<(<>{})<<>{}>><{(){}}[
+<<[{[{[(<(<({{[]{}}[<>]])[{{[]{}}{[]()}}(<<>{}>[<>{}])]>{{(<{}[]>[{}[]])<{[]{}}<[]<>>>}{<{{}[]}([](
+({<<<[[({(<{{<{}()><()<>>}[{[]{}}<[]<>>]}>[<({<>{}}[[]<>])(<(){}>{[]<>})>[[(()()}(<>[])][(<><>)<{}
+[(<[{[[(<{({<[[]<>]><<()[]>[{}()]>}([{<>}<[]<>>]({{}()}<{}{}>])){({(()[])([][])}<<{}{}>({}{})
+{(<<<(([[((<(<()<>>{(){}}){{{}[]}{{}()}}><(({}){<>()})<((){})({}())>>))][[{[<[<>[]]{(){}}>](
+{[<((<[[[<<[[<{}<>>{[]()}]<[{}<>][[]{}]>]{<<{}>[()[]]>{[<><>][<>]}}>{{{{{}()}}[{[]<>}<<><>>]}}>]<
+([(<[[<({{[([{[]()}{<>()}]{[()<>]<<>{}>})({{()()]([]<>)})]{<((<>())[[][]])[[()<>][<>[]]]>}}}{{[[(<<><>>
+<({{({<([[({<{[][]}[{}[]]>}([(<>[])((){})]([[]<>]([]{}))))}({{<<[][]>[()()]>[<()[]>{<>{}}]}[{[{}{}]
+<<<[<<(<(<{{[[()()]{[][]>]<<[]()><[]<>>>}[{(<>()){<><>}}[<()<>>[[]<>]]]}>{(<(<<>>[<><>])([
+[[{({[<{(([<<[<>()](<><>)>{({}<>)(()[])}>{(({}<>){{}<>})}]([<[()[]]>><[(<>[])[<>()]]>)))[{{(({
+[<[<[{{[{{(([{()[]}{<><>}]<[{}()]({}{})>)([{()<>}{[][]}]({<><>}([]<>))))<<{<{}{}]}<(<>())([]
+([(<{<{([<[((<()<>>{[][]}))([<<><>><[]{}>]({()[]}(<>())))]([<[[]<>](())><[(){}]{()[]}>]{[[[]
+[{[{({{[[(([[<{}()]{{}{}}]]){([([][])([]<>)]<[()<>](<>())>){[<(){}>[<>()]]{[{}<>][{}<>]}}})(<[<{()()}([]<>)
+(({<[<[<{({[(<[]<>>{(){}})[<[][]>([]{})]]{<<<>{}>(()<>)>[[()[]]}}})}{<<<((()<>)[{}{}]){<<>{}>[<>()]}><<
+<[{[<[([[{{<{(<><>)[{}[]]}<<<>{}><{}()>>>}}{<<(({}[])([]{})}{(<>{}){[]<>}}>((([]<>)<{}()>){{{}<>}})><<<<
+[<[([[{({(<<<(<>())>(([]())[<>{}])><<<[]()>[()<>]><(<>){<>{}>>>><({[[]{}]<{}[]>}([<>{}][{}<>
+{(<[<<(<[({(({[]()}<[]{}>)({[]<>}{<><>})){<(()[]){[][]}>([()]<<>()>)}}{{((<>())[()]){[{}<>]<<>
+(<{{<(({{{<[[([]()>]<{<>()}[{}{}]>]>[([[()<>](<>())][{<>{}}<[][]>])<[<()[]>]({()[]}[[]()])>]}}}))>[[<
+((({{<[{[((<(<[][]>([]())){[()<>][{}{}]}>){<{{<><>}<<><>>}<([]<>)>>{([{}()][()[]])}})<[<{{<>}[[][]]}[[()[]]
+([<((<(<{<{{[<[]<>>{(){}}](<{}[]>(()[]))}}>}>)<{([{<<{()()}{()[]}>[{{}()}({}[])]><[[{}[]](<>())]{[()(
+<<[<<(({({((([[][]]<[]{}>)<({}<>){()()}>)[<[{}<>][[]()]>{<[]()><<>>}])})}{(([[[<[][]><[]{}>](<{}[]>{
+<<[(<<(((<([[{()()}<(){}>]({()<>}[()<>])][{((){})(<><>)}{<<>[]>({}{})}]){(<{()[]}[<>()]>)<({<><>}){[
+{(<[{([<(<[(({<>()})<[{}<>]{()<>}>)(([<>()]{[][]}))]{[<{[]{}}>[(()<>)])(<({}{})><[{}<>]{<><>}>)
+{((<{[<{{[[{(<<>[]>{{}[]})}{[({}<>)[<>[]]]}]]<[[[[()]{{}<>)]{({}()){[][]}}]<[{<><>}<[][]>]((<>
+{(<({[<<<(<<{[{}{}]}([[]()]({}[]))>(({<>()}<[]>)<{{}()}{{}{}}>}>)(<{{[()[]]{()}}(<<>()>{[]<>})}>)>[([[<{<
+(<<[<<[(([[{({()}[<>[]])}][<(<[][]>{(){}})>(<<{}{}>{{}[]}>[({}<>)<<>[]>])]]))]((({[{{<[]{}>{{}()}}[([][])({}<
+(({{<({<{{(<<{<>{}}{()[]}><[(){}][()[]]>><[<<>[]>{{}}](<()[]>{[]{}})>)}<{<([()<>]{<>{}})[([
+(<<[<{<{{<(({({}())([]{})}<({}())>)[[({}{})[<>()]]]>{{<{{}{}}<{}()>>(({}{})[{}{}])}}>({({<<
+[[{([{<<<{<({[()[]][{}()]})>[{[({}{})[()()]](<<>()><<>[]>)}<(<<><>><[]{}>)<(<><>)<[]()>>>]}>>>}])}({(<<[[
+(<{(<<({[[{({{{}{}}[<>()>}[[<><>]])}]<{(<{()<>}{[]()}>[([][])[{}[]]])<[[<>][(){}]]{<[][]>([]{})}>}[((<<><>
+<(({[(<<[<[[{{()()}(<>())}(<[][]><<><>>)]][[(<[]>[<>[]])([[]{}]{<>()})]{{[[]{}](<>[])}({()()}([]()))}]>]({({
+<<([<(((<{{[(<<>()>(()[])){{[]<>}<[]{}>}]<{[<>()][(){}]}>}<<[<{}<>>]>{([<><>]{<><>}){{{}[]
+(([{[[[<{[{[[[()()]<()>]<[{}{}][(){}]>]}]}{[<{{[()<>][()[]]}}[{{()()}}[[<>[]][{}()]]])<<({<>()}<{}()>)>({([
+{[(<{{({[{{[{([]>({}<>)}<<{}[]>>][[{(){}}[<><>]]{<(){}>({}())}]}}[{([({}()){()[]}]{({})<[]<>>})[[[[]<>]]([<>
+(([{[({{<([[([[]{}]<()[]>)(<<>>[<>[]])]{[{()()}<{}{}>](<{}()>([]{})>}])<[<{{<>{}}}<[<>[]]>>{[{[]
+{({<<({<<<<{(([]()))(<<>()>)}({<()<>>{{}{}}})>[{[(<>)]{<[][]>[{}()]}}]>({[[[{}[]]({}[])]]})>>{{
+[(<[<((<[(([((<><>)([]{})){([][])[()()]}]<{{{}{}}{(){}}}>)<{{({}{})<()>}({()()}[[]{}])}<[[<>()]{()<>}>({<>}
+<{{[(({{<((<({[]{}}(()()))[[{}{}]{{}<>}]>[([<>[]>(()<>))]))[[([{<><>}<<>[]>][[()<>]([][])]){<((){}){{}[
+((<[({<<({{[<[(){}](<><>)>[{[][]}[{}[]]]]}<([(<><>){[]{}}])([[()()]<()[]>])>}(([[[[]()]{{}{}}]{[{}<>]{()
+(({{[<<<[[{<<[<><>]<{}<>>>[<<>()>(<>{})]>}<{(<()()><{}()>)<([]())[<>{}]>}>]]<<{([(<>{})[<>()]]{{[]()}{()(
+<[{{{<<<[{[{<[()[]]({}[])>}[{({}{}){<>[]}}{<<>[]>[{}[]]}]]<[<({}{})>(([]())<{}{}>)]{([{}[]]([]<>)
+{<<<[[(([{{[[(()<>)<()()>]][[{{}[]}[()()]]]}<<{[{}()]<{}[]>}[{()[]}<[]<>>]>>}]))][{(<[(<[<<><>>(()())]<({}{
+(<<<{{(<{[[[[(()())<<>[]>]<[[][]]>]((<{}<>><[][]>)[([]())[()()]])]([(<{}>(()[]))<([]()){[]{}}>]))}>)}({
+({<(({{{<{{[{<()<>>[<>[]]}([[]()][()()])]{([()<>]({}())){{{}()>{[]<>}}}}}>}<[{[<[<{}()>[{}{}]]<<()()><()(
+<[{<<<([{<[{{<[][]><[]{}>}{[{}]{{}}}}<<{()[]}([]{})>([{}[])(()()))>][<[{[][]}{(){}}]{[()[]
+{<[{{[<([[[[<{()[]}[<>()]>{<<>[]>{{}()}}]<({[]{}}{()<>}){{()[]}(<>{})}>]({[<()[]]([]{})][<<>()>(<><>)]}<<
+({{[(([<[<[[{(()[])}{(()[])[()()]}]{[(<><>){<>{}}]<<[]<>><<><>>>}]>]<[(([<<>[]>]))]<((<{{}{}}{(){}}>
+({[[(({[[<(<({<>{}})[([]<>)([]{})]>[<([][])<{}{}>>(<()()>)]){<[[<>()]{[]{}}]({{}{}}([]()))>}>]]}<{<{
+[[{([<({[[[<<<[]{}>({}())>([{}<>][<><>])>{<(()<>)<<><>>>{[<>{}]{[]{}}}}]{{((()[]))[({}[])<[]{}>]}[({<>{}
+([[(([<[<([(<(<>()){{}{}>><<<>[]>[{}<>]>)<(<[]()>[()[]])>])>(<{([{[][]}<<>()>]<[<>[]]>)(<<{
+([{({<<<<[[({[[]<>]({}<>)}[({}[])(<>{})])][<{((){}){[]()}}<[{}[]]<[]{}>>>(<<()[]><{}<>>]{[<><>][{}<>]}
+<<<<{{({<{{[([<>()][[][]]){{[]{}}<{}()>}][(<[]{}>[{}<>]>[{<>[]}((){})]]}}(<<<{[]{}}{{}}><([]{})({}<>)>>({((
+[[<<{<{<(<{({{{}[]}}((<>)(<>[]))){{{[]()}<()()>}[{<>()}<[]{}>]}}{[{({}{})<{}[]>}({<>[]}{[]<>})]{([{}
+{{{[{[([[{{[{<{}>({}<>)}[([][]){<><>}]]([{{}[]}])}[<[[[]()]]{[[]{}]}>{<{<>()}>}]}]{[{[[[<>{}]{[]}]((
+(<[[<<<({[[{{[<>[]]<(){}>}}<({<><>}{<>{}}){((){})([]<>)}>](<[[{}[]][[]]][{{}<>}[{}{}}]>((([][])[()()]){<()
+{([((<{{{[[<<{()()}<[])>[{<>()}<()()>]>]((<[{}<>]<{}()>>{{{}<>}(()())}){{<()[]>(<><>)}{[[]()](<>())}})]}
+{{<<<<({[<{<([{}<>]([][]))<<{}[]>([]{})>><[{<>()}{[]()}](<(){}><[]()>)>}<[<<[][]>({}())>(<[]
+{[<[[((<({<<[<{}<>><{}()>]><<<{}<>>{<>}>{{{}[]){()<>}}>>([[{[][]}(()[])](({}[]){{}{}})])}<<({(<>
+[[[<([[([<[{[{()[]}{{}[]}][(()()){[]{}}]}{{{<><>}{[][]}}{<{}<>]({}())}}]>[[<[{()<>}<{}{}>]<{[]()}({}<>)>>{<<
+({[{<[[[([[((({}<>)((){})){({}{}){{}()}})[[(()())<{}[]>]]>[[[<{}()>]<[[]]<()[]>>][<(()<>){[]()}
+[[<[{[<<<<{{({[]<>}({}[]))[<<><>>([]{})]}[<{<><>}<[]{}>><([]())[()<>]>]}<([{<><>}<()()>]<[(){}]({})>
+[{(<<{{((({[<{<>[]}>](<[[]]({}[])>(<{}{}>{()()}))}<([({}<>)<{}()>]({[][]}({}())))>)<{{((<><>
+{{((<(<[[<<(<([]()){()<>}><[()()]{[]{}}>)[[({}{})({}{})]<<{}{}><[][]>>]>[(<(())[<>[]]>)<<[<>()
+[{([({<<{<<[{<[]>({}{})}((<>[])<<><>>)][<([])><{[]<>}<[]{}>>]><{({<>()}<<>[]>)}>>(([[({}{})[()[]]]
+<{([({{{{(([{<[]()>(<>())}{{{}{}}{{}()}}]<{<{}()>[()<>]}({()[]}{<><>})>)<((<<>()>{<>{}}))({([]<>)[{}{}]}<([]
+<{<[(<<({<(([(<><>)([]())]){{<<>()>}(<{}{}>{<>[]})})[{[{()<>}[<>[]]]([()()]{{}})}{([<>()]<[]()>)<[<>[]]{{}()
+<{<{[[({<[[([[{}<>][{}<>]][(<>[]){()[]}])<([()[]])[<()<>>[{}()]]>}{[{[{}[]]<[]<>>}[(<>[])<()()>]]([<
+[<{(<{<(([{[<<()()><()[]>>{({}{})<[][]>}]<(<(){}>)>}[<<<[]()>>[({}<>)([]())>><<((){}){<><>
+[[[(((<({[([[<<>()>]{(<><>)<[]<>>}]([<[]()>{()()}]{[{}()]{<>}}))[[([<><>](<>[]))({<>()})]]](<(([[]
+<{({(([{<[(<{{[]()}}>({[{}{}]{[]{}}}[{()}(<>{})>))]<(([[()][[][]]])<<<{}<>><(){}>>>)({<(<>{})>(([]())({}<>))
+<([([[[<([(<(([]<>)){[[]()][()]}>{[{<>()}([]{})]{([]<>)({}[])>})]<[<({(){}}(()<>)){{{}()}<[]{}>}><[[<>{}]
+([(<[({<<(<{{(()<>)<(){}>}{<{}{}>}}>[<<(<>())<{}[]>><[<>()][<><>]>><<([]{}){[]()}>>])<[<{<[]()>[[]{}]}{([])<(
+(<<{[<[(<(<<[<(){}>[[]{}]][({}())<[]{}>]>>{[<(<>())<{}()>>][<{{}<>}<[][]>><[<>()](()())>]}]>{({[<<[]()
+[([<<<([<<[{{<()()><{}()>}{<[]{}>}}]{[{[[]()]}]({<(){}>(()[])})}>(<{{<<>{}>{()()}}<(()[])[[]()]>}(<<(){}>{
+<(<([((<((({(((){})]{{{}}<{}>}}<<(()())({}())>((<>[])([]()))>)){{[<((){})<<><>>>]}})><<[<[({[]{}}(<><>)){(<
+<{[<[[({<[<<{(<>[])[()[]]}{<<>>(()[])}><[{(){}}[<>()]][{[][]}(()<>)]>>{<<(<>[])[[]()]>{{<>()}<{}
+<<({[({{[([{[<[]><<>[]>]}<{{{}[]][()<>]}{{()[]}[{}<>]}>])]}<<{([{(<>[]){{}<>}}]([[<>()][()<>]]))({(<{
+(<{{{[[([<[{{{[]<>}[()<>]}<<<>()>>}[((()[]){()[]})]]>{{([([][])])<([<><>]{()<>})(<<>{}><<>{}>)>}{<<<[]
+[[([<([[<[<{({()<>}{[]{}}){[{}[]][<>[]]}}>]>]{{({(([{}[]]({}{})){[<>{}]{{}<>}})<((<>()))[{[]{}}]>}((((
+({[<<[[[{{{[<<[]>([]<>)>(([]<>)<[]{}>)][<<{}[]>({}{})>]}([[<{}{}>[()[]]]((()<>)[<>[]])]{([()<>]{[][]}){{<><
+{<[{({[<({({[{{}[]}[[]{}]]({{}{}}([]()))}[(<()<>>{[]{}}){<[]{}>[()]}])}<({<{[]()}({}[])>[(()){<>()}]}
+[([{{(([[{<[{(()())[{}[]]}<<<>><{}[]>>]{[{[]()}[[]<>]](<{}{}>[()()})}>}[([(<{}<>><{}<>>)(<<>{}>([]{}))]({([]{
diff --git a/10/solve.zig b/10/solve.zig
new file mode 100644
index 0000000..c07ae47
--- /dev/null
+++ b/10/solve.zig
@@ -0,0 +1,87 @@
+const std = @import("std");
+
+const Pair = struct {
+    opening: u8,
+    closing: u8,
+    score: u32,
+};
+
+const pairs = [4]Pair{
+    Pair{
+        .opening = '(',
+        .closing = ')',
+        .score = 3,
+    },
+    Pair{
+        .opening = '[',
+        .closing = ']',
+        .score = 57,
+    },
+    Pair{
+        .opening = '{',
+        .closing = '}',
+        .score = 1197,
+    },
+    Pair{
+        .opening = '<',
+        .closing = '>',
+        .score = 25137,
+    },
+};
+
+pub fn main() !void {
+    var alloc = std.heap.GeneralPurposeAllocator(.{}){};
+    defer std.debug.assert(!alloc.deinit());
+    var gpa = &alloc.allocator;
+
+    const stdin = std.io.getStdIn().reader();
+
+    var res: u32 = 0;
+    var scores = std.ArrayList(u64).init(gpa);
+    defer scores.deinit();
+
+    var tmp: [256]u8 = undefined;
+    while (try stdin.readUntilDelimiterOrEof(&tmp, '\n')) |line| {
+        var stack = std.ArrayList(u8).init(gpa);
+        defer stack.deinit();
+        var corrupt = false;
+
+        for (line) |char| {
+            for (pairs) |pair| {
+                if (char == pair.opening) {
+                    try stack.append(char);
+                }
+                if (char == pair.closing) {
+                    var matching = stack.pop();
+                    if (matching != pair.opening) {
+                        res += pair.score;
+                        corrupt = true;
+                    }
+                }
+            }
+        }
+
+        if (!corrupt and stack.items.len > 0) {
+            var score: u64 = 0;
+
+            std.mem.reverse(u8, stack.items);
+
+            for (stack.items) |char| {
+                score *= 5;
+                for (pairs) |pair, i| {
+                    if (char == pair.opening) {
+                        score += (@intCast(u64, i) + 1);
+                    }
+                }
+            }
+
+            try scores.append(score);
+        }
+    }
+
+    std.sort.sort(u64, scores.items, {}, comptime std.sort.asc(u64));
+    var middleScore = scores.items[@divFloor(scores.items.len, 2)];
+
+    std.debug.print("{}\n", .{res});
+    std.debug.print("{}\n", .{middleScore});
+}
diff --git a/10/testinput b/10/testinput
new file mode 100644
index 0000000..2f182d8
--- /dev/null
+++ b/10/testinput
@@ -0,0 +1,10 @@
+[({(<(())[]>[[{[]{<()<>>
+[(()[<>])]({[<{<<[]>>(
+{([(<{}[<>[]}>{[]{[(<()>
+(((({<>}<{<{<>}{[]{[]{}
+[[<[([]))<([[{}[[()]]]
+[{[{({}]{}}([{[{{{}}([]
+{<[[]]>}<{[{[{[]{()[[[]
+[<(<(<(<{}))><([]([]()
+<{([([[(<>()){}]>(<<{{
+<{([{{}}[<[[[<>{}]]]>[]]
\ No newline at end of file