2021 Day 10 Complete
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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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@ -0,0 +1,94 @@
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package main
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import (
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"fmt"
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"sort"
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h "git.bullercodeworks.com/brian/adventofcode/helpers"
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)
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func main() {
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fix(h.StdinToStringSlice())
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}
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func fix(inp []string) {
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var clean []string
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var fixScores []int
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var score int
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for i := range inp {
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var opens []byte
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valid := true
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for _, b := range inp[i] {
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switch b {
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case '(':
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opens = append(opens, byte(b))
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case '[':
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opens = append(opens, byte(b))
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case '{':
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opens = append(opens, byte(b))
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case '<':
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opens = append(opens, byte(b))
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case ')':
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if opens[len(opens)-1] != '(' {
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valid = false
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score += 3
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} else {
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opens = opens[:len(opens)-1]
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}
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case ']':
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if opens[len(opens)-1] != '[' {
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valid = false
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score += 57
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} else {
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opens = opens[:len(opens)-1]
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}
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case '}':
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if opens[len(opens)-1] != '{' {
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valid = false
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score += 1197
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} else {
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opens = opens[:len(opens)-1]
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}
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case '>':
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if opens[len(opens)-1] != '<' {
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valid = false
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score += 25137
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} else {
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opens = opens[:len(opens)-1]
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}
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}
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if !valid {
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break
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}
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}
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if valid {
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var fixLineScore int
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for bi := len(opens) - 1; bi >= 0; bi-- {
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switch opens[bi] {
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case '(':
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inp[i] = inp[i] + string(')')
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fixLineScore = (fixLineScore * 5) + 1
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case '[':
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inp[i] = inp[i] + string(']')
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fixLineScore = (fixLineScore * 5) + 2
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case '{':
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inp[i] = inp[i] + string('}')
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fixLineScore = (fixLineScore * 5) + 3
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case '<':
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inp[i] = inp[i] + string('>')
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fixLineScore = (fixLineScore * 5) + 4
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}
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}
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clean = append(clean, inp[i])
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fixScores = append(fixScores, fixLineScore)
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}
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}
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sort.Ints(fixScores)
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acScore := fixScores[len(fixScores)/2]
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fmt.Println("# Part 1")
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fmt.Println("Syntax Checker Score:", score)
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fmt.Println()
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fmt.Println("# Part 2")
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fmt.Println("Autocomplete Score:", acScore)
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}
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@ -0,0 +1,143 @@
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# Advent of Code
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--- Day 10: Syntax Scoring ---
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You ask the submarine to determine the best route out of the deep-sea cave, but it only replies:
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Syntax error in navigation subsystem on line: all of them
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All of them?! The damage is worse than you thought. You bring up a copy of the navigation subsystem (your puzzle input).
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The navigation subsystem syntax is made of several lines containing chunks. There are one or more chunks on each line, and chunks contain zero or more other
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chunks. Adjacent chunks are not separated by any delimiter; if one chunk stops, the next chunk (if any) can immediately start. Every chunk must open and close
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with one of four legal pairs of matching characters:
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• If a chunk opens with (, it must close with ).
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• If a chunk opens with [, it must close with ].
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• If a chunk opens with {, it must close with }.
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• If a chunk opens with <, it must close with >.
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So, () is a legal chunk that contains no other chunks, as is []. More complex but valid chunks include ([]), {()()()}, <([{}])>, [<>({}){}[([])<>]], and even
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(((((((((()))))))))).
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Some lines are incomplete, but others are corrupted. Find and discard the corrupted lines first.
|
||||
|
||||
A corrupted line is one where a chunk closes with the wrong character - that is, where the characters it opens and closes with do not form one of the four
|
||||
legal pairs listed above.
|
||||
|
||||
Examples of corrupted chunks include (], {()()()>, (((()))}, and <([]){()}[{}]). Such a chunk can appear anywhere within a line, and its presence causes the
|
||||
whole line to be considered corrupted.
|
||||
|
||||
For example, consider the following navigation subsystem:
|
||||
|
||||
[({(<(())[]>[[{[]{<()<>>
|
||||
[(()[<>])]({[<{<<[]>>(
|
||||
{([(<{}[<>[]}>{[]{[(<()>
|
||||
(((({<>}<{<{<>}{[]{[]{}
|
||||
[[<[([]))<([[{}[[()]]]
|
||||
[{[{({}]{}}([{[{{{}}([]
|
||||
{<[[]]>}<{[{[{[]{()[[[]
|
||||
[<(<(<(<{}))><([]([]()
|
||||
<{([([[(<>()){}]>(<<{{
|
||||
<{([{{}}[<[[[<>{}]]]>[]]
|
||||
|
||||
Some of the lines aren't corrupted, just incomplete; you can ignore these lines for now. The remaining five lines are corrupted:
|
||||
|
||||
• {([(<{}[<>[]}>{[]{[(<()> - Expected ], but found } instead.
|
||||
• [[<[([]))<([[{}[[()]]] - Expected ], but found ) instead.
|
||||
• [{[{({}]{}}([{[{{{}}([] - Expected ), but found ] instead.
|
||||
• [<(<(<(<{}))><([]([]() - Expected >, but found ) instead.
|
||||
• <{([([[(<>()){}]>(<<{{ - Expected ], but found > instead.
|
||||
|
||||
Stop at the first incorrect closing character on each corrupted line.
|
||||
|
||||
Did you know that syntax checkers actually have contests to see who can get the high score for syntax errors in a file? It's true! To calculate the syntax
|
||||
error score for a line, take the first illegal character on the line and look it up in the following table:
|
||||
|
||||
• ): 3 points.
|
||||
• ]: 57 points.
|
||||
• }: 1197 points.
|
||||
• >: 25137 points.
|
||||
|
||||
In the above example, an illegal ) was found twice (2*3 = 6 points), an illegal ] was found once (57 points), an illegal } was found once (1197 points), and an
|
||||
illegal > was found once (25137 points). So, the total syntax error score for this file is 6+57+1197+25137 = 26397 points!
|
||||
|
||||
Find the first illegal character in each corrupted line of the navigation subsystem. What is the total syntax error score for those errors?
|
||||
|
||||
Your puzzle answer was 296535.
|
||||
|
||||
--- Part Two ---
|
||||
|
||||
Now, discard the corrupted lines. The remaining lines are incomplete.
|
||||
|
||||
Incomplete lines don't have any incorrect characters - instead, they're missing some closing characters at the end of the line. To repair the navigation
|
||||
subsystem, you just need to figure out the sequence of closing characters that complete all open chunks in the line.
|
||||
|
||||
You can only use closing characters (), ], }, or >), and you must add them in the correct order so that only legal pairs are formed and all chunks end up
|
||||
closed.
|
||||
|
||||
In the example above, there are five incomplete lines:
|
||||
|
||||
• [({(<(())[]>[[{[]{<()<>> - Complete by adding }}]])})].
|
||||
• [(()[<>])]({[<{<<[]>>( - Complete by adding )}>]}).
|
||||
• (((({<>}<{<{<>}{[]{[]{} - Complete by adding }}>}>)))).
|
||||
• {<[[]]>}<{[{[{[]{()[[[] - Complete by adding ]]}}]}]}>.
|
||||
• <{([{{}}[<[[[<>{}]]]>[]] - Complete by adding ])}>.
|
||||
|
||||
Did you know that autocomplete tools also have contests? It's true! The score is determined by considering the completion string character-by-character. Start
|
||||
with a total score of 0. Then, for each character, multiply the total score by 5 and then increase the total score by the point value given for the character
|
||||
in the following table:
|
||||
|
||||
• ): 1 point.
|
||||
• ]: 2 points.
|
||||
• }: 3 points.
|
||||
• >: 4 points.
|
||||
|
||||
So, the last completion string above - ])}> - would be scored as follows:
|
||||
|
||||
• Start with a total score of 0.
|
||||
• Multiply the total score by 5 to get 0, then add the value of ] (2) to get a new total score of 2.
|
||||
• Multiply the total score by 5 to get 10, then add the value of ) (1) to get a new total score of 11.
|
||||
• Multiply the total score by 5 to get 55, then add the value of } (3) to get a new total score of 58.
|
||||
• Multiply the total score by 5 to get 290, then add the value of > (4) to get a new total score of 294.
|
||||
|
||||
The five lines' completion strings have total scores as follows:
|
||||
|
||||
• }}]])})] - 288957 total points.
|
||||
• )}>]}) - 5566 total points.
|
||||
• }}>}>)))) - 1480781 total points.
|
||||
• ]]}}]}]}> - 995444 total points.
|
||||
• ])}> - 294 total points.
|
||||
|
||||
Autocomplete tools are an odd bunch: the winner is found by sorting all of the scores and then taking the middle score. (There will always be an odd number of
|
||||
scores to consider.) In this example, the middle score is 288957 because there are the same number of scores smaller and larger than it.
|
||||
|
||||
Find the completion string for each incomplete line, score the completion strings, and sort the scores. What is the middle score?
|
||||
|
||||
Your puzzle answer was 4245130838.
|
||||
|
||||
Both parts of this puzzle are complete! They provide two gold stars: **
|
||||
|
||||
At this point, you should return to your Advent calendar and try another puzzle.
|
||||
|
||||
If you still want to see it, you can get your puzzle input.
|
||||
|
||||
References
|
||||
|
||||
Visible links
|
||||
. https://adventofcode.com/
|
||||
. https://adventofcode.com/2021/about
|
||||
. https://adventofcode.com/2021/events
|
||||
. https://adventofcode.com/2021/settings
|
||||
. https://adventofcode.com/2021/auth/logout
|
||||
. Advent of Code Supporter
|
||||
https://adventofcode.com/2021/support
|
||||
. https://adventofcode.com/2021
|
||||
. https://adventofcode.com/2021
|
||||
. https://adventofcode.com/2021/support
|
||||
. https://adventofcode.com/2021/sponsors
|
||||
. https://adventofcode.com/2021/leaderboard
|
||||
. https://adventofcode.com/2021/stats
|
||||
. https://adventofcode.com/2021/sponsors
|
||||
. https://adventofcode.com/2021
|
||||
. https://adventofcode.com/2021/day/10/input
|
||||
|
|
@ -0,0 +1,10 @@
|
|||
[({(<(())[]>[[{[]{<()<>>
|
||||
[(()[<>])]({[<{<<[]>>(
|
||||
{([(<{}[<>[]}>{[]{[(<()>
|
||||
(((({<>}<{<{<>}{[]{[]{}
|
||||
[[<[([]))<([[{}[[()]]]
|
||||
[{[{({}]{}}([{[{{{}}([]
|
||||
{<[[]]>}<{[{[{[]{()[[[]
|
||||
[<(<(<(<{}))><([]([]()
|
||||
<{([([[(<>()){}]>(<<{{
|
||||
<{([{{}}[<[[[<>{}]]]>[]]
|
||||
Loading…
Reference in New Issue