From 34608bbdf1e30feabd2f4afc250b4dc2717ab7fc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micha=C5=82=20Kleszczy=C5=84ski?=
 <michalkamilkleszczynski@gmail.com>
Date: Mon, 2 Dec 2024 16:24:32 +0100
Subject: [PATCH] 2024 Day 02

---
 2024/d01/main.ts         |   14 +-
 2024/d02/input.txt       | 1000 ++++++++++++++++++++++++++++++++++++++
 2024/d02/main.ts         |   48 ++
 2024/d02/test-runs/0.txt |    6 +
 2024/tsconfig.json       |    1 -
 2024/util/aoc.ts         |   70 +--
 2024/util/array.ts       |   17 +
 README.md                |    2 +-
 package.json             |    5 +-
 9 files changed, 1118 insertions(+), 45 deletions(-)
 create mode 100644 2024/d02/input.txt
 create mode 100644 2024/d02/main.ts
 create mode 100644 2024/d02/test-runs/0.txt
 create mode 100644 2024/util/array.ts

diff --git a/2024/d01/main.ts b/2024/d01/main.ts
index 3e97021..a76d243 100644
--- a/2024/d01/main.ts
+++ b/2024/d01/main.ts
@@ -12,9 +12,12 @@ const part1 = (data: ReadonlyArray<[number, number]>): number => {
 }
 
 const part2 = (data: ReadonlyArray<[number, number]>): number => {
-  const rightCounts = counting(data.map(item => item[1]), item => item)
+  const rightCounts = counting(
+    data.map(item => item[1]),
+    item => item,
+  )
   const similiarityScores = data.map(item => (rightCounts[item[0]] ?? 0) * item[0])
-  
+
   return sum(similiarityScores)
 }
 
@@ -24,12 +27,9 @@ const reader = (file: string): ReadonlyArray<[number, number]> => {
     .map(line => {
       const match = line.match(/(\d+)\s+(\d+)/)
 
-      return [
-        parseInt(match[1], 10),
-        parseInt(match[2], 10)
-      ] as [number, number]
+      return [parseInt(match[1], 10), parseInt(match[2], 10)] as [number, number]
     })
 }
 
 testRuns('01', reader, part1, part2)
-solutionRuns('01', reader, part1, part2)
\ No newline at end of file
+solutionRuns('01', reader, part1, part2)
diff --git a/2024/d02/input.txt b/2024/d02/input.txt
new file mode 100644
index 0000000..05f7e9f
--- /dev/null
+++ b/2024/d02/input.txt
@@ -0,0 +1,1000 @@
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+17 20 21 23 25
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+12 14 15 16 18 21
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+81 78 76 73 72 70 69 67
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+74 72 69 67 65
+42 43 44 45 48 49 52 54
+52 49 48 46 44 42 39 36
+32 31 30 28 27 25 23
+37 36 33 32 30
+82 79 77 75 73 71 70
+33 35 38 41 44
+85 83 80 77 75 74 73
+20 17 14 13 12 10 8 7
+2 3 6 8 11 12
+17 15 13 10 9
+44 47 48 51 53 55
+15 16 18 20 21 24 27
+31 32 35 37 39
+58 60 62 63 64 66 67
+80 79 78 77 76 74
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+70 67 64 61 60
+48 45 44 43 40
+51 49 47 44 42 40 38
+37 36 34 31 28
+78 80 83 85 87 88 90 93
+28 27 25 22 20 19 16
+21 23 25 28 29
+14 17 18 21 22 25
+51 53 55 56 58
+64 67 69 72 74 77
+4 7 8 11 12 15
+84 83 82 79 76 73 72 70
+87 86 85 84 82
+74 72 69 68 65 64 61 58
+51 48 47 44 43 42 41 38
+54 51 50 48 47 45 44 42
+11 12 15 16 18 20
+79 81 84 85 86
+29 30 32 35 37
+67 66 65 64 62 59 57 55
+18 19 20 22 23 26 29 32
+80 78 76 75 74 72 71 68
+6 7 8 11 13 16
+53 56 57 59 61
+6 9 11 13 15 18
+90 87 85 83 82 80
+77 75 73 71 70
+43 45 48 49 50 52 53
+74 75 76 79 81 83
+56 58 60 62 65 66 68
+65 67 70 73 75 77 78
+40 38 35 34 33 30 29 26
+67 70 73 75 78
+42 45 48 49 50
+55 52 51 50 49 46 45
+20 18 15 13 10 9 8 5
+37 40 43 46 48
+18 16 15 13 12 9 7
+73 70 69 68 67 65 64
+4 5 7 8 9 12 13
+28 30 31 32 33
+47 48 50 52 55
+10 12 14 16 18
+10 9 6 5 4 1
+54 52 49 46 43 41 38
+20 18 17 15 13 12
+25 26 27 30 31 34
+70 69 68 67 65 62 61
+39 42 44 46 47 48 51 54
+30 31 32 34 37
+74 71 70 68 67 65 62 61
+71 74 75 78 81 82
+42 45 46 48 50 52
+45 48 50 52 55 57 60
+76 73 72 70 67 65
+17 15 12 11 10
+8 10 12 13 16 17
+33 36 39 42 43
+35 37 39 40 42 45 46 49
+66 63 61 59 56
+21 20 19 17 14 12
+77 74 71 69 68 67
+67 69 70 71 73
+15 18 20 22 25 26 29 32
+40 43 46 49 52 54 56 57
+69 68 67 66 63 60
+80 82 85 87 89
+51 50 49 47 45 42 41
+95 93 92 89 88
+10 11 14 16 19 20 21
+89 86 83 80 77 74 72
+47 44 42 41 40 39 37 36
+47 49 52 55 58
+22 23 25 28 29
+78 80 83 84 87 89 92
+29 28 25 24 23 21
+13 14 17 18 20 23
+42 45 46 48 49 50 51 54
+62 59 57 56 54 51 50 48
+64 66 68 70 71 73 75 77
+29 26 25 22 21
+29 27 25 24 23 22 21
+4 5 7 9 10 13
+92 89 86 85 82 81 78
+66 63 62 60 59 57 55 52
+56 54 52 51 49
+84 87 90 91 93
+21 18 16 14 13 11 10 8
+64 62 61 60 59 57 55 53
+84 86 88 90 92 93 95
+69 68 67 64 61 59 56 53
+22 23 26 29 30
+80 77 76 74 71
+65 67 69 70 72 75 76 79
+55 57 60 61 62 65 68 69
+10 9 7 6 3
+2 4 6 7 9 12 13 15
+2 3 4 5 8 10 12
+86 85 84 83 82 81
+91 89 87 86 83 80 79 78
+19 22 24 26 28 31 32
+50 52 54 56 57 59
+94 93 92 90 88 86
+40 37 35 32 31 29 28 26
+44 47 48 50 53 56 57 59
+2 3 4 7 10 12 15 16
+73 70 67 64 61 60 58
+66 64 61 60 59
+30 33 36 39 40 42 44 45
+58 61 62 64 66 68 70
+42 45 48 50 52
+85 84 83 80 79 76 73
+49 46 45 44 41 38
+77 78 80 82 84 87 88 91
+16 14 11 9 8 5
+37 35 32 31 29 28 27
+53 54 56 59 61 63
+99 98 97 94 92 91 89 86
+94 92 91 88 87 86
+73 75 76 79 80 82 85 87
+53 51 50 49 47 44 41 39
+83 80 77 74 71 68 66 63
+30 33 36 37 40
+74 73 72 71 68 67 64
+71 69 68 67 66 64
+73 72 69 66 65 63 60 59
+48 47 44 41 38 35
+42 45 48 50 52 53 56
+13 11 9 7 5 3 1
+51 50 47 45 43
+11 13 16 18 19 22
+13 12 9 8 7 5
+57 56 55 52 50 48 47 44
+75 78 81 82 84 85 87
+49 51 54 56 57 60 62 64
+23 21 18 16 15
+72 70 68 65 62
+37 35 34 32 29 27 25 23
+78 80 83 85 87 88
+23 24 27 30 31 32
+13 16 18 20 22 24
+63 61 60 58 56 55 52
+54 51 49 48 47 44 41 40
+10 13 15 18 20 23 26
+74 72 69 66 64 62
+61 60 58 56 53 50 49
+35 34 31 29 26 25
+18 16 13 10 7 5 2
+65 68 71 74 76 79
+63 64 67 70 71 72
+58 60 61 63 65 66 69 71
+58 59 62 65 68
+83 84 87 90 92 93 94
+73 71 68 65 63 60 57 55
+82 85 87 89 92 95 96
+40 43 44 46 49 50
+75 78 79 82 84 86 87
+24 26 27 29 32 33 34 35
+80 79 78 75 72 69 67 66
+7 10 12 14 17 18 21
+72 69 67 65 63 61 60
+76 75 73 72 69 68 67
+62 59 56 54 53 50 47 45
+12 14 17 19 21
+51 50 49 47 45
+50 49 47 45 43
+66 67 70 71 74 75
+73 74 75 76 77 79 82 85
+33 34 36 37 38 40
+21 22 23 26 28
+36 34 32 30 27 24 22
+81 83 85 86 89 90 92 93
+50 51 54 57 60 61 64 66
+12 10 8 6 3
+79 76 75 73 72
+84 86 89 92 93
+66 68 70 73 74 77 78 81
+47 49 52 54 57 58
+52 55 57 60 62
+77 74 72 70 67 64 61
+67 68 69 71 73 75 77
+96 95 94 91 89 87 85 82
+33 30 29 27 24 23 20 18
+57 55 52 50 47
+41 44 45 47 50 51 53
+15 18 21 24 26 28
+23 22 20 17 16 13 10 7
+75 73 72 70 67 66 65 64
+47 48 49 50 53 55
+88 91 92 94 97 98
+43 46 47 50 52 54 56 58
+44 45 48 51 52 54
\ No newline at end of file
diff --git a/2024/d02/main.ts b/2024/d02/main.ts
new file mode 100644
index 0000000..cfe036f
--- /dev/null
+++ b/2024/d02/main.ts
@@ -0,0 +1,48 @@
+import { readFileSync } from 'node:fs'
+
+import { testRuns, solutionRuns } from '../util/aoc'
+import { nextItemDiffReducer } from '../util/array'
+
+const isLineSafe = (line: ReadonlyArray<number>): boolean => {
+  const sign = Math.sign(line[0])
+
+  return line.every(item => [1, 2, 3].includes(Math.abs(item))) && line.every(item => Math.sign(item) === sign)
+}
+
+const part1 = (data: ReadonlyArray<ReadonlyArray<number>>): number => {
+  return data.map(nextItemDiffReducer).filter(isLineSafe).length
+}
+
+const part2 = (data: ReadonlyArray<ReadonlyArray<number>>): number => {
+  return data
+    .map(line => {
+      const lines: Array<ReadonlyArray<number>> = [line]
+
+      for (let i = 0; i < line.length; i++) {
+        lines.push([...line.slice(0, i), ...line.slice(i + 1, line.length)])
+      }
+
+      return lines
+    })
+    .map(lines => {
+      return lines.map(nextItemDiffReducer)
+    })
+    .filter(lines => {
+      return lines.some(isLineSafe)
+    }).length
+}
+
+const reader = (file: string): ReadonlyArray<ReadonlyArray<number>> => {
+  return readFileSync(file, 'utf-8')
+    .trim()
+    .split('\n')
+    .map(line => {
+      return line
+        .trim()
+        .split(' ')
+        .map(item => parseInt(item, 10))
+    })
+}
+
+testRuns('02', reader, part1, part2)
+solutionRuns('02', reader, part1, part2)
diff --git a/2024/d02/test-runs/0.txt b/2024/d02/test-runs/0.txt
new file mode 100644
index 0000000..82cd679
--- /dev/null
+++ b/2024/d02/test-runs/0.txt
@@ -0,0 +1,6 @@
+7 6 4 2 1
+1 2 7 8 9
+9 7 6 2 1
+1 3 2 4 5
+8 6 4 4 1
+1 3 6 7 9
\ No newline at end of file
diff --git a/2024/tsconfig.json b/2024/tsconfig.json
index 640ea06..3c43903 100644
--- a/2024/tsconfig.json
+++ b/2024/tsconfig.json
@@ -1,4 +1,3 @@
 {
   "extends": "../tsconfig.json"
 }
-
diff --git a/2024/util/aoc.ts b/2024/util/aoc.ts
index d20985f..69da02e 100644
--- a/2024/util/aoc.ts
+++ b/2024/util/aoc.ts
@@ -3,71 +3,71 @@ import { dirname, join } from 'node:path'
 import { fileURLToPath } from 'node:url'
 import chalk from 'chalk'
 
-const __dirname = dirname(fileURLToPath(import.meta.url));
+const __dirname = dirname(fileURLToPath(import.meta.url))
 
 const testRun1 = <TResult>(result: TResult, testFileName: string, durationInMs: number): void => {
-  console.log(chalk.yellow(`[TST] (${testFileName})\t\tPart 1: ${result}\t\t${durationInMs}ms`));
+  console.log(chalk.yellow(`[TST] (${testFileName})\t\tPart 1: ${result}\t\t${durationInMs}ms`))
 }
 
 const testRun2 = <TResult>(result: TResult, testFileName: string, durationInMs: number): void => {
-  console.log(chalk.red(`[TST] (${testFileName})\t\tPart 2: ${result}\t\t${durationInMs}ms`));
+  console.log(chalk.red(`[TST] (${testFileName})\t\tPart 2: ${result}\t\t${durationInMs}ms`))
 }
 
 const solutionPart1 = <TResult>(result: TResult, durationInMs: number): void => {
-  console.log(chalk.green(`[SLN]\t\t\tPart 1: ${result}\t\t${durationInMs}ms`));
+  console.log(chalk.green(`[SLN]\t\t\tPart 1: ${result}\t\t${durationInMs}ms`))
 }
 
 const solutionPart2 = <TResult>(result: TResult, durationInMs: number): void => {
-  console.log(chalk.blue(`[SLN]\t\t\tPart 2: ${result}\t\t${durationInMs}ms`));
+  console.log(chalk.blue(`[SLN]\t\t\tPart 2: ${result}\t\t${durationInMs}ms`))
 }
 
 const testRuns = <TInput, TResult>(
-  day: string, 
-  reader: (file: string) => TInput, 
-  part1: (data: TInput) => TResult, 
+  day: string,
+  reader: (file: string) => TInput,
+  part1: (data: TInput) => TResult,
   part2: (data: TInput) => TResult,
 ): void => {
-  const dirPath = join(__dirname, `../d${day}/test-runs`);
+  const dirPath = join(__dirname, `../d${day}/test-runs`)
 
   if (existsSync(dirPath)) {
-      const testFiles = readdirSync(dirPath);
+    const testFiles = readdirSync(dirPath)
 
-      testFiles.forEach(file => {
-          const testData = reader(join(dirPath, file));
+    testFiles.forEach(file => {
+      const testData = reader(join(dirPath, file))
 
-          const start1 = Date.now();
-          const valuePart1 = part1(testData);
-          const duration1 = Date.now() - start1;
+      const start1 = Date.now()
+      const valuePart1 = part1(testData)
+      const duration1 = Date.now() - start1
 
-          const start2 = Date.now();
-          const valuePart2 = part2(testData);
-          const duration2 = Date.now() - start2;
+      const start2 = Date.now()
+      const valuePart2 = part2(testData)
+      const duration2 = Date.now() - start2
 
-          testRun1(valuePart1, file, duration1);
-          testRun2(valuePart2, file, duration2);
-      });
+      testRun1(valuePart1, file, duration1)
+      testRun2(valuePart2, file, duration2)
+    })
   }
 }
 
 const solutionRuns = <TInput, TResult>(
-  day: string, 
-  reader: (file: string) => TInput, 
-  part1: (data: TInput) => TResult, 
+  day: string,
+  reader: (file: string) => TInput,
+  part1: (data: TInput) => TResult,
   part2: (data: TInput) => TResult,
 ): void => {
-  const filePath = join(__dirname, `../d${day}/input.txt`);
-  const data = reader(filePath);
+  const filePath = join(__dirname, `../d${day}/input.txt`)
+  const data = reader(filePath)
 
-  const start1 = Date.now();
-  const valuePart1 = part1(data);
-  const duration1 = Date.now() - start1;
+  const start1 = Date.now()
+  const valuePart1 = part1(data)
+  const duration1 = Date.now() - start1
 
-  const start2 = Date.now();
-  const valuePart2 = part2(data);
-  const duration2 = Date.now() - start2;
+  const start2 = Date.now()
+  const valuePart2 = part2(data)
+  const duration2 = Date.now() - start2
 
-  solutionPart1(valuePart1, duration1);
-  solutionPart2(valuePart2, duration2);
+  solutionPart1(valuePart1, duration1)
+  solutionPart2(valuePart2, duration2)
 }
 
-export { testRuns, solutionRuns }
\ No newline at end of file
+export { testRuns, solutionRuns }
diff --git a/2024/util/array.ts b/2024/util/array.ts
new file mode 100644
index 0000000..1c6905e
--- /dev/null
+++ b/2024/util/array.ts
@@ -0,0 +1,17 @@
+/**
+ * Use with reduce to get difference between current and next item
+ *
+ * e.g:    [7, 6, 4, 2, 1].map(nextItemDiffReducer)
+ * returns [1, 2, 2, 1]
+ */
+const nextItemDiffReducer = (line: ReadonlyArray<number>): ReadonlyArray<number> => {
+  return line.reduce((acc, item, index, arr) => {
+    if (index >= arr.length - 1) {
+      return acc
+    }
+
+    return [...acc, item - arr[index + 1]]
+  }, [])
+}
+
+export { nextItemDiffReducer }
diff --git a/README.md b/README.md
index cff9bbe..16bc5d9 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,7 @@ Some editions were finished later, or even done in a different time (for example
 | [2021](2021) | [Elixir][lang-elixir] | 06/50 |Why have i chosen Elixir...                                     |
 | [2022](2022) | [TypeScript][lang-ts] | 38/50 |With some help from [Radash][lib-radash] and [Ramda][lib-ramda] |
 | [2023](2023) | [TypeScript][lang-ts] | 20/50 |With some help from [Radash][lib-radash] and [Ramda][lib-ramda] |
-| [2024](2024) | [TypeScript][lang-ts] | 02/50 |With some help from [Radash][lib-radash] and [Ramda][lib-ramda] |
+| [2024](2024) | [TypeScript][lang-ts] | 04/50 |With some help from [Radash][lib-radash] and [Ramda][lib-ramda] |
 
 [lang-c#]: https://learn.microsoft.com/pl-pl/dotnet/csharp/
 [lang-elixir]: https://elixir-lang.org/
diff --git a/package.json b/package.json
index ab83bf1..dc80165 100644
--- a/package.json
+++ b/package.json
@@ -7,7 +7,10 @@
   "scripts": {
     "aoc": "tsx",
     "dotnet": "dotnet run --project",
-    "format": "prettier 2022 2023 --write",
+    "format": "prettier 2022 2023 2024 --write",
+    "format:2022": "prettier 2022 --write",
+    "format:2023": "prettier 2023 --write",
+    "format:2024": "prettier 2024 --write",
     "postinstall": "husky"
   },
   "devDependencies": {