2021: day10: part 1
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aoc2021/input/day10.txt
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aoc2021/input/day10.txt
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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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{{{<[([[{<[<{([]{}>{<>()}}{<(){}><()()>}>[{[[][]](<>())}[{[]<>}[<>[]]]]]{<{{{}[]}{<><>}}[[()()](<
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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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{<<({(<[(<[[{{[][]}{{}}}<[[]()]<<>())>]](<{{{}<>}{()<>}}>)>)]<(({{[[[][]]]}<[[(){}]<[]{}>]>}))>
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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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[<<{{<[[{[<(<{()[]}[(){}]><[()[]]<<>{}>>)>[[[[[]{}]{[][]}]{<[]{}><(){}>}]({{<>()}<<>{}>}({()<>
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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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<<((<[<(([<{[<{}<>>][<{}{}>{{}[]}]}[{<<>()>[[]{}]}{[()[]]([]{})}]><{({()()}{[]})<{[]()}[{}{}]>}{((<>(
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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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<([{{{(<{{{<<({}()){(){})>{<{}{}>{<>()}}>{(<()[]>({}()))<({}())<()()>>}}[(({[]{}}[<>{}])([{}<>])){{{{}}(<
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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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{<{([([{<<<<{[<>()]<[]>}[[()<>]<()>]>>(([[<>[]][{}{}]])((([][]){<><>})([[]{}]<()<>})))><{<<[()()]<[]()>
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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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{[{<<(<([({{<<[]<>>[<>{}]>{<{}<>>([]<>)}}([<<>{}>((){})}<{<>[]}>)}<<({{}()})<(<>[])[[]]>>[[<<>[]>{()[]}][[[]
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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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{((({[{<{[<({[{}()]({}{})}<(<>)(()())>)({[[]{}](<><>)}[<<>[]>[<>[]]])><<[{[]<>}][([][])<[]()>]>(
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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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<<(<<<{{{<<(<<[]<>>{<>()}>[<[]>])<{<{}<>>}{[{}{}]<<>[]>}>><{<<<>{}>({}<>)>}{([()[]]<<>()>)(<<><>><[]{}>)}>><
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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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<<({[[<<[([(<[<><>]{<>{}}>{<(){}>(()())})<{[<>{}]<()[]>}>]<{[{<>{}}<<>()>]<{{}()}[()<>]>}<[[{}<>][{
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aoc2021/input/day10_provided.txt
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aoc2021/input/day10_provided.txt
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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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125
aoc2021/src/day10.rs
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aoc2021/src/day10.rs
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use std::fmt::Write;
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use anyhow::{bail, Result};
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const INPUT: &str = include_str!("../input/day10.txt");
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pub fn run() -> Result<String> {
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let mut res = String::with_capacity(128);
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writeln!(res, "part 1: {}", part1(INPUT)?)?;
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Ok(res)
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}
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|
||||||
|
fn part1(input: &str) -> Result<u64> {
|
||||||
|
let lines = input
|
||||||
|
.lines()
|
||||||
|
.map(str::parse::<Line>)
|
||||||
|
.collect::<Result<Vec<_>>>()?;
|
||||||
|
|
||||||
|
Ok(lines.iter().map(Line::corrupt_score).sum())
|
||||||
|
}
|
||||||
|
|
||||||
|
enum SymbolState {
|
||||||
|
Open(Symbol),
|
||||||
|
Close(Symbol),
|
||||||
|
}
|
||||||
|
|
||||||
|
impl TryFrom<char> for SymbolState {
|
||||||
|
type Error = anyhow::Error;
|
||||||
|
|
||||||
|
fn try_from(value: char) -> Result<Self> {
|
||||||
|
match value {
|
||||||
|
'(' | '[' | '{' | '<' => Ok(SymbolState::Open(value.try_into().unwrap())),
|
||||||
|
')' | ']' | '}' | '>' => Ok(SymbolState::Close(value.try_into().unwrap())),
|
||||||
|
_ => bail!("invalid char for symbol"),
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
#[derive(PartialEq, Eq)]
|
||||||
|
enum Symbol {
|
||||||
|
Parenthesis, // ()
|
||||||
|
Bracket, // []
|
||||||
|
Brace, // {}
|
||||||
|
AngleBracket, // <>
|
||||||
|
}
|
||||||
|
|
||||||
|
impl Symbol {
|
||||||
|
fn score(&self) -> u64 {
|
||||||
|
match self {
|
||||||
|
Symbol::Parenthesis => 3,
|
||||||
|
Symbol::Bracket => 57,
|
||||||
|
Symbol::Brace => 1197,
|
||||||
|
Symbol::AngleBracket => 25137,
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
impl TryFrom<char> for Symbol {
|
||||||
|
type Error = anyhow::Error;
|
||||||
|
|
||||||
|
fn try_from(value: char) -> Result<Self> {
|
||||||
|
match value {
|
||||||
|
'(' | ')' => Ok(Symbol::Parenthesis),
|
||||||
|
'[' | ']' => Ok(Symbol::Bracket),
|
||||||
|
'{' | '}' => Ok(Symbol::Brace),
|
||||||
|
'<' | '>' => Ok(Symbol::AngleBracket),
|
||||||
|
_ => bail!("invalid char for symbol"),
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
struct Line {
|
||||||
|
symbols: Vec<SymbolState>,
|
||||||
|
}
|
||||||
|
|
||||||
|
impl Line {
|
||||||
|
fn corrupt_score(&self) -> u64 {
|
||||||
|
let mut stack = Vec::new();
|
||||||
|
|
||||||
|
for state in &self.symbols {
|
||||||
|
match state {
|
||||||
|
SymbolState::Open(symbol) => stack.push(symbol),
|
||||||
|
SymbolState::Close(symbol) => match stack.pop() {
|
||||||
|
Some(other_symbol) if symbol == other_symbol => continue,
|
||||||
|
_ => return symbol.score(),
|
||||||
|
},
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
0
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
impl std::str::FromStr for Line {
|
||||||
|
type Err = anyhow::Error;
|
||||||
|
|
||||||
|
fn from_str(s: &str) -> Result<Self> {
|
||||||
|
Ok(Line {
|
||||||
|
symbols: s
|
||||||
|
.trim()
|
||||||
|
.chars()
|
||||||
|
.map(TryFrom::try_from)
|
||||||
|
.collect::<Result<Vec<_>>>()?,
|
||||||
|
})
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
#[cfg(test)]
|
||||||
|
mod tests {
|
||||||
|
use super::*;
|
||||||
|
|
||||||
|
const PROVIDED: &str = include_str!("../input/day10_provided.txt");
|
||||||
|
|
||||||
|
#[test]
|
||||||
|
fn part1_provided() {
|
||||||
|
assert_eq!(part1(PROVIDED).unwrap(), 26397);
|
||||||
|
}
|
||||||
|
|
||||||
|
#[test]
|
||||||
|
fn part1_real() {
|
||||||
|
assert_eq!(part1(INPUT).unwrap(), 394647);
|
||||||
|
}
|
||||||
|
}
|
|
@ -9,3 +9,4 @@ pub mod day06;
|
||||||
pub mod day07;
|
pub mod day07;
|
||||||
pub mod day08;
|
pub mod day08;
|
||||||
pub mod day09;
|
pub mod day09;
|
||||||
|
pub mod day10;
|
||||||
|
|
|
@ -11,6 +11,7 @@ use aoc2021::day06;
|
||||||
use aoc2021::day07;
|
use aoc2021::day07;
|
||||||
use aoc2021::day08;
|
use aoc2021::day08;
|
||||||
use aoc2021::day09;
|
use aoc2021::day09;
|
||||||
|
use aoc2021::day10;
|
||||||
|
|
||||||
fn main() -> Result<()> {
|
fn main() -> Result<()> {
|
||||||
let days: &[DayFunc] = &[
|
let days: &[DayFunc] = &[
|
||||||
|
@ -23,6 +24,7 @@ fn main() -> Result<()> {
|
||||||
day07::run,
|
day07::run,
|
||||||
day08::run,
|
day08::run,
|
||||||
day09::run,
|
day09::run,
|
||||||
|
day10::run,
|
||||||
];
|
];
|
||||||
|
|
||||||
aoc::run(days)
|
aoc::run(days)
|
||||||
|
|
Loading…
Reference in a new issue