Solved 9

december_10/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "december-10"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

december_10/example.txt

@@ -0,0 +1,10 @@
+[({(<(())[]>[[{[]{<()<>>
+[(()[<>])]({[<{<<[]>>(
+{([(<{}[<>[]}>{[]{[(<()>
+(((({<>}<{<{<>}{[]{[]{}
+[[<[([]))<([[{}[[()]]]
+[{[{({}]{}}([{[{{{}}([]
+{<[[]]>}<{[{[{[]{()[[[]
+[<(<(<(<{}))><([]([]()
+<{([([[(<>()){}]>(<<{{
+<{([{{}}[<[[[<>{}]]]>[]]

december_10/input.txt

@@ -0,0 +1,94 @@
+<[<<({{<{<[[([()][()()])<{[]<>}{<>}>><<<[]{}>>{<<><>>({}{})}>][<<<{}<>>([])>{<{}><()>}>]><(<{(()[]){[](
+<{([({{[(<[({({}{})[()<>]}{{<>{}}[(){}]})]>({(<<<><>>{{}()}>)<<<[]><{}<>>><[{}[]]<<>[]>>>}))[{(<{([]
+([<([({(<([<({()()}(<>[]))[<[]()>{<>{}}]>]<{{{{}{}}{()()})({[]}[<>{}])}>)>)}){<<{{(<<<()<>><<><>>>
+[{{[<<[{([[{{[<>{}]<()<>>}[(()<>)[{}<>]]}<<[{}[]]([]<>)>{{[]{}}{()()}}>]][[{<({}{})<[]{}>>
+<<{{<([(((([{<[]<>>{()<>}}(<<>[]>{(){}})]([{{}<>}<[]>](<[][]><{}()>)))))[({{{<[]{}>[()]}<<<><>>
+<(<[{(<[{{{<{[[]<>]{<>()}}><[[{}()][(){}]]>}}<[<[<()()>({}<>)]><[{[]()}([][])](<(){}>[<><>])>]{
+{[[<{{<<[[<<(({}<>){<><>})[[<>()][[]{})]>[[[{}[]]<<>>]{(<>[])}]>{{<<()[]>{<>{}}>[{[]<>}<[]{}>]
+({[((((([{[({[{}[]]<[]()>}[({}{})<<>[]>])<[(()[])<{}()>]{[[]<>]{[]()})>](([({}<>)(()[])][<[]{}>])
+{[[{[({(<<{<([{}<>])<({}<>)({}<>}>>[<[{}()]([]<>)>((<>())<[]{}>)]}<([(<>())[(){}]]{[{}<>]<[][]>}){<{<><
+(<{<<[<<([[([<<><>>]<<{}()><[]<>>>)]][{(({<>{}}(()())))(<[()()]<[]()>>)}[[<<<>()><<>{}>>([{}<>][{}[]])]{<{(
+<<[({{{{{[<([((){})([]())]<((){})({}[])>)[{[{}()]{[]<>}}]>([<{{}<>}><({}<>)({}[])>]<[{<>{}}
+(([[{{({{{[<<{[]()}({})>{{{}()}[[]<>]}>{<([])>[[[]{}]]}](([<[]{}>]<<[]<>><{}[]>>))}}}(([[[{[<><>
+<<[(<[{{<((<[<()>[<><>]][[<><>]([]())]>[({<>})<<()<>><{}[]>>])[[(<[]<>>([]())){{<>[]}(()())}]]){(<(<[]<>>
+({[<<[[{<[[{{[()()]{()[]}}}]<{([{}{}]{[]()})[[()[]]<<>>]}>]>}[({((<{<><>)>{{[]()}{{}[]}}){([{}[]]<{}{}>)<
+([{{<{[(<[<<[({}())({}())]>>[{[<<>[]>[<>()]]<(<>[]){()[]}>}(<<<>[]>[<>[]]>{<<>[]>{{}()}})]]{
+<[{{<[((<([[{<<><>>{()}}{<{}[]><[]()]}]])<{({<()>{()[]}}(<(){}><[]<>>)){[({}[]){<>[]}]}}<<([()()]<()(
+<{<{[(({(({({<[]>([])}<<()<>>{<>()}>){[[()[]]<{}()>]{({}[])[()<>]}}}<[<<{}()><[]{}>>({[][]}[()<>])}{<<[]
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+{((<<<{<(<[[[<{}<>}]<(<><>)>]]<(([(){}]{[]()}))<({{}<>}<()<>>){<()<>>{(){}}}>>>{({({()[]}[<>
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+(<{<(({[(({[[<<>{}>({}<>)]{({}{}){(){}}}]{(<(){}>[[][]])<{()<>}>}}[[[{[]{}}[()]]](([[]()][(){}]))])
+([({<{[{<[{<({{}()}{{}()})>}]>}<<[[{{((){})<<>{}>}(({}[]){<>[]})}]]><[{{<({}<>)(()())>[{<>()}{{}()}]}{<{
+<[{[({[<<[[<<{{}{}}<{}{}>>([<>][(){}])><<<{}{}>>>]]{([{[[]()][[][]]}<{[]<>}>]<<[<>[]][[]()]><<()[
+[{({{{<<{[{([[()]({}[])]{[()()]})(((<>{})[[][]])<{{}{}}>)}]}>>}[((({{<([[]()][[]])}}{{<({}[])[{}
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+{[<<{(<[{(<[({[]{}}{[]{}}}]({<()[]><<>[]>}{<[]()>[{}{}]})>)}{[{(((<><>))(<[]<>>(()[])))[[<[]()>[{}()]](((
+({[<<([[{(<<<{<>()}<{}<>>>[[[]{}){()}]><[[(){}]<[]<>>]({(){}}[[]{}])>>{[{[()<>][{}()]}][[[{}{}]<<>()
+([(<((<{[[[[[{{}()}{()[]}]]<([[]<>])<[()<>][[][]]>>]][{([{()[]}(()[])]({<>{}}{[]()}))}({([[]
+(({{[<<{(([{<{()()}[[]()]>{<()<>>[[]{}]}}{[<()()>[[]{}]]{([]())({}[])}}][(<{<>[]}[()()]><<()>(()())>)
+[<(<{{{<{(<{(<<>[]><<>()>){<{}()><()<>>}}(<[<>{}]{<>{}}><[{}{}][<>()]>)>)}{{{(<(<><>)(<>())><{[]}([][
+<<<{([[<[[[(([[]{}])<({}())(<>())>)({[<>{}]{[]()}}<<(){}>{(){}}>)]{([(()()>({}[])]((<><>)<
+{{({<<<[[<(<{{{}<>}({}[])}{<{}<>><<>()>}>{({{}<>}({}()}){[[]<>]([]{})}}){{[[[][]](()())]}([<<>{}
+<<[[<{{({<{[{<<>()><()()>}<[()<>]<()()>>]{(([]<>)[{}[]]){{{}<>}{[]<>})}}>{{<[<{}<>>({}())]
+({[<[[{<<{{[{(<>{})}]{<[{}{}][[]()]>[[[]{}][()()]]}}[(<<{}[]>{<>[]}>{{{}<>}[(){}]}){{[<>{}]<{}{}>}{
+(([<{<[[([[(((()<>))({{}[]}<()<>>))[[({}[])(())]<{(){})>]][{((()){[]()}){{()<>}{<><>}}}[{{()}{()[]}}]]]){{(({
+{<[{(<[{[{{[<([]<>)<{}<>>>]}}]}]><{{<[[([{<>()}[[]{}]]({{}()}{<>{}}))]{([<[]{}>(()<>)]<[[]<>]([])
+{[<<[<(<[{<<[{{}()}{<>{}}](<{}<>>({}<>))>><{<({}[])<()<>>>[[<>[]][<><>]]}[<(<><>){{}<>}>[<[]()>{[]}]]>}]{[<{<
+(<({{[{<(<<<{[{}<>]({}[])}{[[]{}]<()[]>}>(<[[]()][()()]><[()[]][<>()]>)>>[(<<<{}()>{<><>}>>){<<{<><>}(
+(<{[[{{<(<(<({{}<>}{{}()}){[()<>]<{}[]>}>[(<{}{}><[]()>)<({}<>){()()}>]){[[([]{}){{}[]}]<[{}{}]<[][]>>][{<()
+[(<([({[[[<[[[[][]][{}{}]]([{}()]{<>{}})]{<{()()}<()<>>><{{}<>}<(){}>>}>]{{[([[][]]<()()>)
+(<(<<({{(<[{{[()<>][<>{}]}[<[]<>>]}<<{[]{}}>[[{}()]{()()}]>]{[([()()]<<>>)({()<>}[<>[]])][{{[][]}(<>())}
+[[((({(({{{[{{<>[]}[<>{}]}[[{}<>]([]())]][{(<><>)}]}][(<{{[][]}(<><>)}<[[]()]>>([[{}()]<[]<>>][<[][]>[()()]])
+<{({(([((<[<{(()[])<[][]>}{<<><>><[]<>>}><<([]<>)([]<>)>>]{[<([]{}]{<>{}}>]}>[{[(([]{})[{}{}])[<<>{}
+{(([<{(({<({{{{}{}}}[[[]]{[]()}]}{<[[]]<<>()>>(<()>[()<>])})>{{[(([]<>){{}()}){[{}]{{}<>}}]}([[([]{})]<[[](
+<{[({<{[[[{{{[{}{}]}}([<[][]>[<>[]}][<<>()>{()}])}((<({}[])[<><>]>(((){})[{}()]))[[<{}[]>[(
+{<[([(<((<<<<[{}[]]({}{})>((()())[(){}])><([[]{}][()<>])<<<>[]>([]<>)>>><[[((){}){[][]}}{[[]]
+[{(<{<{<<({({(()<>){{}[]}}([[]()]{()<>}))(([[]<>](())))}<{({()[]}{[][]})}])>>}>(({[{[{{([]())(<><>)
+<[[<([<<({[[(<[]()><<><>>)({<>})]{{<<><>>[()[]]}([()<>](()[]))}]((<{<>{}}<(){}>>))}<<[(<(){}><<>{}>)[[()[
+<[{<<<{[{<{(<[<>{}][{}()]>((<>[])[<><>]))<[({}<>)<<>[]>]<(<><>)(<>{})>>}({<<[][]>([]<>)>([<>{}><<>[]>
+[<<(<{((<([<({{}{}](<>[]))[[()<>]([][])]>((([])<(){}>))]){<{{<()[]>(()<>)}(<[]<>>([][]))}><[([(
+{[[[{{<[[{<[<<<>[]>{<><>}>{<<>{}><[]<>>}]((<{}()>(<>[])))><<{<<>{}>{(){}}}([{}{}]<<>()>)><[{<>{}}]>>}]
+((((([[(([{<({()[]}<()<>>)><<<<>()>({}{})>{{(){}}(<>[])}>}<<<{<><>}>><(((){})<[]()>){{()()}({}<>)}>
+<<[<[{<[<[<{[[()[]]({}[])]{<{}<>>[{}{}]}}[([[][]])[([]())[[]<>]]]>[(<<{}()>(()<>)>{{[]{}}<{}{}>})({([
+[{<(<{(<[<[[[{()<>}[[][]]][(()<>){{}[]}]](<{<>{}}[()[]]>(<[]>[{}()]))]([([<>{}]<()[]>){{<>{}}{()
+<[<({<({[{({{(<>{}){[]()}}<{[]<>}[(){}]>}({[<>[]]{[]<>}}))<{([{}[]])(({}[]){(){}})}[{[[]<>]}[({}())[(){}]]]
+[[[{<[((<[<{([[]<>]{<><>})<<{}[]>[[][]]>}{[[<>{}]]<<{}>([]<>)>}>{<{{<>[]}}[(<><>)[[]<>]])<{[(){}]<()()>}>}]{{
+([(<({[[{<([{{<>{}}([]<>)}[[{}[]]{<>{}}]](<[{}<>]{[]()}><((){})[[][])>)){({{{}{}}{{}{}}}[<{}{}>({}<
+<[{(((({[[{{({{}[]]<<>>)<{[]()}<()<>>>}((<(){}>([]{})))}{({[()()]([]<>)}<([]<>)[()()]>)<[{{}[
+<[({[<<<<{[({{(){}}[{}<>}}(<<>[]>[[]()])){(<()[]><<>()>)}]}><({<[{()()}]({[]{}}<{}>)>[({[]
+<<([[<{{([{<{([]{})[(){}]}{([]{})<{}[]>}><<(<>{})[<>()]>({{}<>})>}<[(<<>()><{}()>)<{()<>}<<>>
+<[[[({[({<[{((<>[]]<{}<>>){<<>()>{[]()}}}<{<{}{}>[<>{}]}{{{}[]}{{}()}}>]{<{{()()}<[]<>>}((
+[[({(([[(([<[([]<>){{}()}]>(<{{}{}}(()<>)>[{<><>}{{}<>}])]{{<[[]<>]>[[{}()]]}([<{}()>][([]{})<{}
+<(([<{([[<[((([]<>)<<><>>){[[]()]({}{})})({{(){}}((){}]}({{}()}))]([<{<>()}<[]{}>><{[]{}}<(){}>>])>
+<<[[{<<{[(<<{{[][]}[[]<>]}<<[][]><<>[]>]>([{<>}[<>[]]]{{[]()}<{}()>})>{({({}<>){[]<>}}[{<>{}}[<>[]]
+((<<<<[[(({[[<()<>>[(){}]]{(<>()){<>{}}}]}{(([<>[]><<>()>)<<(){}><()()>>)[(<{}{}>((){}))[{[][]}(()<>)]]})){
+[({(<{{<<<{<[{[]()}<<><>>][[()[]][<>[]]]>}>([([<[]<>>]{<<>()><()<>>})({<{}[]><()()>}[[[]()]])]<{<(()
+([(<({[([{{{((()())[<>[]]){{[]<>}[{}{}]}}([{()<>}<{}()>])}}<{[({(){}}(<><>)}<(<>())>][<[(){}]{(){}}
+{[[{((((([[{{[[]{}]({}{})}{[[]<>](()[])}}[{[()()]}((<>{})<(){}>)]]{(<{<>()}<(){}>>){(<{}()>{{}<>})({<>(
+([[{<[<[[<<{<{()<>}[<>()]>[[[]{}]{{}{}}]}<[{{}[]}]>>{<{{<>{}}([]())}>[(<<>()>)(<{}()>[<>()])]}>{({<[()<>]
+{(([{[{{(({(<[()[]][<>[]]>)<[(()<>){{}{}}]>}[(<<{}{}><{}<>>>){<[()()]<()()>>({[][]}<<><>>)}
+<[{<(<<[{[({[({}<>)<<>[]>](<<>()>(<><>))})[([{<><>}<()()>])]]}]><<[<({{{<>}}<([]][<>{}]>}[<(())<<><>>>])
+(<(({<[[{{[<[{<>[]}[()<>])((()()){{}[]})>]}}]]((<<<((({}{})<{}>){{{}<>}{<>}})[({{}()}{<>()}){{{}()}}]
+{[<[{(([<[{{[([]{})<[][]>]{([][])[()<>]}}<<(()<>)>>}[[(({}{}){{}<>})]]]{{[(<{}{}>[{}()])({()()}
+[{{((<<[[((<<{[]<>}<{}>>(<{}<>>{[]()})>({<()>([][])><[{}{}]{{}()}>))(({([]<>)([]())}<{[][]}<()>>)
+({([{({[({[<({{}{}}([]()))(((){}){{}{}}>>({(()()){{}()}})]<[[{{}{}}<{}[]>]{<[][]><<>[]>}]({<<>[]>
+{[({[{{[<[{([<{}{}>[(){}]](<{}<>>{{}()}))([([]()){()[]}]([{}<>]{<>{}}))}]>[{{[[{[][]}]]<((()[])([]{}))<[()
+[[(({{{(([[[{[()()]([]())}((<>){{}{}])]]({<[<>]({}{})>([<>{}]{{}{}})})]))}[(<[[(([[][]]{<>{}}){{(){}}})
+<(<({<{<[<(<{<()><<><>>}<<{}[]>([]<>)>>)<{<{[]{}}[{}()]>}([(()[]){[]<>}]{{<>()}{{}<>}})>}{[[{(()[]){(
+[(<(<([{<[{<(<()>([]<>))[{()()}<{}<>>]><{([]())<<>()>}(<{}{}>[()[]])>}]<{<({[][]}<[]()>){{{}[
+[<({<{(<<[[[<{()[]}{{}[]}>{[<><>]}]{[<()<>>({}<>)]}]][[{<[<>[]>([]())><{()()}{[]{}}>}([({}{})[[](
+<<[[{{<<([[{[(()())[()]][[{}[]]{{}}]}[[({}<>){[]{}}]{{<><>}[()[]]}]]{<[(<>())]>{({{}()}(()<>))}}])
+{<[{({[({{<({[{}()]([][])}([{}<>]{[]()}))[<(<><>)([]{})><{()()}(<>[])>]>{{(<[]<>>[{}])}[<{(){}}(<>
+<{{(({([[<[{<(<>)([]{})>{<<>{}>{(){}}}}]{[<([]{})<{}{}>>[[<>{}]{()<>}]][{{<><>}([]())}({()<>}<()>)]}>]
+{<{[{[({[(({<[{}()]({}[]}>[<()>]}{(<<>>)}))]})]{<{<{[[{(<>())[()[]]}[[{}{}][[]]]][([[]()]<{}<>>)[<[]{}>([]<>
+((<{{<[[<{{([([]{})<<>()>]<(<>{})(()<>)))([{()()}(<><>)]<(<>)(<>{})>)}([<{(){}}<<>{}>>]<[([]<
+[<<<{(((<<{([<()[]>({})]({<>()}(()())))({([])<<>>}((()[])[()[]]))}{<[<{}()>]<[{}{}]({}<>)>>{<<
+[[[<<<<[{(<<[{{}[]}]<(<><>)(<>[])>><<<<><>][[][]]>(([]{}))>>([<[[]<>]<[]<>>><{()<>}([][])>]))}<(
+<<{[[[{{{{[[(([]{}))([<>[]]<()>)][{(<>()){[]()}})]{(({<><>}{<>[]})[<<>[]>[()()]])}}}<{(<((<><>)(<>{}))<{

december_10/src/main.rs

@@ -0,0 +1,122 @@
+use std::fs::File;
+use std::io::{BufReader};
+use std::io::prelude::*;
+
+
+fn main(){
+    let file = File::open("./input.txt").expect("Read failed");
+    let reader = BufReader::new(file);
+
+    let mut line_vec: Vec<Vec<char>> = Vec::new();
+
+   for line in reader.lines(){
+    let line_as_string = line.unwrap();
+    let line_as_char_vec = line_as_string.chars().collect::<Vec<char>>();
+    line_vec.push(line_as_char_vec);
+   }
+
+   let mut round_depth: u32 = 0;
+   let mut square_depth: u32 = 0;
+   let mut curly_depth: u32 = 0;
+   let mut pointy_depth: u32 = 0;
+   let mut current_opened: Vec<char> = Vec::new();
+   let mut corrput: bool = false;
+   let mut error_scores_2: Vec<u64> = Vec::new();
+
+   let mut illegal_chars: Vec<char> = Vec::new();
+
+   for (index, line) in line_vec.iter().enumerate() {
+        current_opened = Vec::new();
+       for symbol in line {
+           match symbol {
+               '(' => {round_depth += 1; current_opened.push('(');},
+               '[' => {square_depth += 1; current_opened.push('[');},
+               '{' => {curly_depth += 1; current_opened .push('{');},
+               '<' => {pointy_depth += 1; current_opened.push('<');},
+               ')' => {
+                    if round_depth > 0 && current_opened[current_opened.len()-1] == '(' {
+                        round_depth -= 1; 
+                        current_opened.pop();
+                    } else {
+                        corrput = true;
+                        illegal_chars.push(symbol.to_owned());
+                        break;
+                    }
+               },
+               ']' => {
+                    if square_depth > 0 && current_opened[current_opened.len()-1] == '[' { 
+                        square_depth -= 1; current_opened.pop();
+                    } else {
+                        corrput = true;
+                        illegal_chars.push(symbol.to_owned());
+                        break;
+                    }
+                },
+                '}' => {
+                    if curly_depth > 0 && current_opened[current_opened.len()-1] == '{'  {
+                        curly_depth -= 1;
+                        current_opened.pop();
+                    } else {
+                        corrput = true;
+                        illegal_chars.push(symbol.to_owned());
+                        break;
+                    }
+                },
+                '>' => {
+                    if pointy_depth > 0 && current_opened[current_opened.len()-1] == '<'  {
+                        pointy_depth -= 1;
+                        current_opened.pop();
+                    } else {
+                        corrput = true; illegal_chars.push(symbol.to_owned());
+                        break;
+                    }
+                },
+               _ => println!("No")
+           }
+       }
+       if corrput {corrput = false}
+       else if round_depth == 0 && square_depth == 0 && curly_depth == 0 && pointy_depth == 0 {
+
+       } else {
+           round_depth = 0;
+           square_depth = 0;
+           curly_depth = 0;
+           pointy_depth = 0;
+
+           let mut score: u64 = 0;
+           for i in 0..current_opened.len() {
+                
+               let symbol = current_opened[current_opened.len()-1 - i];
+               score = score * 5;
+               match symbol {
+                '(' => score += 1,
+                '[' => score += 2,
+                '{' => score += 3,
+                '<' => score += 4,
+                _ => println!("ERROR")
+               }
+           }
+           error_scores_2.push(score);
+           score = 0;
+
+
+       }
+   }
+
+   let mut error_score: u32 = 0;
+   for symbol in illegal_chars {
+       match symbol {
+           ')' => error_score += 3,
+           ']' => error_score += 57,
+           '}' => error_score += 1197,
+           '>' => error_score += 25137,
+           _ => println!("ERROR")
+       }
+   }
+
+
+   println!("Error score: {}", error_score);
+   error_scores_2.sort();
+   println!("Error scores 2: {}", error_scores_2[(error_scores_2.len()-1) /2  ]  );
+
+}

december_9/example.txt

@@ -0,0 +1,5 @@
+2199943210
+3987894921
+9856789892
+8767896789
+9899965678

december_9/input.txt

@@ -0,0 +1,100 @@
+9876567896542101249889965434567898765698785435678989898897654789424901245699887678932398943999888667
+5995456976543294398767896223456789654988654523599976677789765678919893456989776587891987899898765456
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+9999898756890986573334987898989989789987654367867897656799878998543459876797665678901965346789869878
+9899999646789987654579876567898775679998965489989998767899989019651279765798786989219875457896998767
+8789798756789298777689987679987654598999996797597899878999999198762998754569987895423996567934987656
+6679659987894399888798998989876543497899987965456953989998998999879896543456998976534597789759876547
+5589943198965989999897899492998612986789998954349892199987687889998794332346799989645679898967965431
+3469894239899876543956789321299101975679989421298789098996545678987653201236789899898789987899876672
+2345789345798765432346695490985423986789879910197678987987657899998543212345897679929899896989987983
+1234689956789854301234579989976639897897567891997569896599868998987654324596896578910998745878998754
+2345789897892969219345989879897798789995456879875456789476979997699865537788912345921987634569898765
+6456898798901298998996898768789987656789345967965345799324989896549876745689302399899876547679769876
+7587897689432987887989997657567894345693233459874234678912398765434998656793212989678987756789643987
+8798976568999876776577896543479965456789102398762123489323489886755789767894349876598998767896542398
+9899435456987985325456789632568997697898912987542012395434678987867899878995998765456789878984321459
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december_9/src/main.rs

@@ -1,3 +1,104 @@
-fn main() {
-    println!("Hello, world!");
+use std::fs::File;
+use std::io::{BufReader};
+use std::io::prelude::*;
+
+const RADIX: u32 = 10;
+
+static mut visited: Vec<Vec<bool>> = Vec::new();
+
+fn main(){
+    let file = File::open("./input.txt").expect("Read failed");
+    let reader = BufReader::new(file);
+
+    let mut line_vec: Vec<Vec<u32>> = Vec::new();
+
+   for line in reader.lines(){
+    let line_as_string = line.unwrap();
+    let line_as_int_vec = line_as_string.chars().map(|x| x.to_digit(RADIX).unwrap()).collect::<Vec<u32>>();
+    line_vec.push(line_as_int_vec);
+
+   }
+
+   let height = line_vec.len();
+   let width = line_vec[0].len();
+
+   let mut danger_value = 0;
+
+   let mut low_points: Vec<(usize, usize)> = Vec::new();
+
+   for line_nr in 0..height {
+       for col_nr in 0..width {
+            let upper = if line_nr > 0 {line_vec[line_nr - 1][col_nr]} else { 99 };
+            let lower = if line_nr < height - 1 {line_vec[line_nr + 1][col_nr]} else { 99 };
+            let left = if col_nr > 0 {line_vec[line_nr][col_nr - 1]} else { 99 };
+            let right = if col_nr < width - 1 {line_vec[line_nr][col_nr + 1]} else { 99 };
+            let val = line_vec[line_nr][col_nr];
+            if val < upper && val < lower && val < left && val < right {
+                danger_value += 1 + val;
+                low_points.push((line_nr, col_nr));
+            }
+       }
+   }
+
+   for _ in 0..height {
+    unsafe { visited.push(vec![false; width]); }
+   }
+
+
+   
+   let mut basins: Vec<Vec<(i32, i32)>> = Vec::new();
+   let mut sizes: Vec<i32> = Vec::new();
+
+   for point in low_points {
+    let test  = get_neighbours(point.0 as i32, point.1 as i32, height, width, &line_vec);
+    if test != None {basins.push(test.expect("msg"));}
+   }
+
+   unsafe {
+       for bas in basins {
+           println!("Size of basin: {}", bas.len());
+           sizes.push(bas.len() as i32);
+       }
+   }
+
+   sizes.sort();
+
+   let mul_result = sizes[sizes.len()-1] * sizes[sizes.len()-2] * sizes[sizes.len()-3];
+
+   println!("Danger value: {}", danger_value);
+   println!("Multiplication result: {}", mul_result);
+
 }
+
+fn get_neighbours(line_nr: i32, col_nr: i32, height: usize, width: usize, line_vec: &Vec<Vec<u32>>) -> Option<Vec<(i32, i32)>>{
+    unsafe {
+        if ( line_nr < 0 || line_nr > (height-1) as i32) || ( col_nr < 0 || col_nr > (width-1) as i32) {
+            return None;
+        }
+        if visited[line_nr as usize][col_nr as usize] {
+            return None;
+        }
+        if line_vec[line_nr as usize][col_nr as usize] == 9 {
+            return None;
+        }
+        visited[line_nr as usize][col_nr as usize] = true;
+        let mut result_vec: Vec<(i32, i32)> = Vec::new();
+        let l_res = get_neighbours(line_nr, col_nr-1, height, width, &line_vec);
+        let r_res = get_neighbours(line_nr, col_nr+1, height, width, &line_vec);
+        let u_res = get_neighbours(line_nr-1, col_nr, height, width, &line_vec);
+        let d_res = get_neighbours(line_nr+1, col_nr, height, width, &line_vec);
+        if l_res != None { result_vec.append(&mut l_res?); }
+        if r_res != None { result_vec.append(&mut r_res?); }
+        if u_res != None { result_vec.append(&mut u_res?); }
+        if d_res != None { result_vec.append(&mut d_res?); }
+
+
+        result_vec.push((line_nr, col_nr));
+
+
+
+        return Some(result_vec);
+    }
+
+
+}