day 2

.aocrunner.json

@@ -23,16 +23,18 @@
     },
     {
       "part1": {
-        "solved": false,
-        "result": null,
+        "solved": true,
+        "result": "1882980",
         "attempts": [],
-        "time": null
+        "time": 2.58
       },
       "part2": {
-        "solved": false,
-        "result": null,
-        "attempts": [],
-        "time": null
+        "solved": true,
+        "result": "1971232560",
+        "attempts": [
+          "1882980"
+        ],
+        "time": 2.49
       }
     },
     {

README.md

@@ -12,7 +12,7 @@
 <!--SOLUTIONS-->
 
 [![Day](https://badgen.net/badge/01/%E2%98%85%E2%98%85/green)](src/day01)
-![Day](https://badgen.net/badge/02/%E2%98%86%E2%98%86/gray)
+[![Day](https://badgen.net/badge/02/%E2%98%85%E2%98%85/green)](src/day02)
 ![Day](https://badgen.net/badge/03/%E2%98%86%E2%98%86/gray)
 ![Day](https://badgen.net/badge/04/%E2%98%86%E2%98%86/gray)
 ![Day](https://badgen.net/badge/05/%E2%98%86%E2%98%86/gray)
@@ -76,9 +76,9 @@ Both parts: 0.79ms
 
 ```
 Day 02
-Time part 1: -
-Time part 2: -
-Both parts: -
+Time part 1: 2.04ms
+Time part 2: 1.61ms
+Both parts: 3.6500000000000004ms
 ```
 
 ```
@@ -243,8 +243,8 @@ Both parts: -
 ```
 
 ```
-Total stars: 2/50
-Total time: 0.79ms
+Total stars: 4/50
+Total time: 4.44ms
 ```
 
 <!--/RESULTS-->

src/day02/README.md

@@ -0,0 +1,9 @@
+# 🎄 Advent of Code 2021 - day 2 🎄
+
+## Info
+
+Task description: [link](https://adventofcode.com/2021/day/2)
+
+## Notes
+
+...

src/day02/index.js

@@ -0,0 +1,68 @@
+import run from "aocrunner"
+
+const parseInput = (rawInput) =>
+  rawInput
+    .split("\n")
+    .map((l) => l.split(" "))
+    .map((i) => [i[0], +i[1]])
+
+const actions = {
+  forward: ([h, v], x) => [h + x, v],
+  down: ([h, v], x) => [h, v + x],
+  up: ([h, v], x) => [h, v - x],
+}
+const actions2 = {
+  forward: ([h, v, a], x) => [h + x, v + a * x, a],
+  down: ([h, v, a], x) => [h, v, a + x],
+  up: ([h, v, a], x) => [h, v, a - x],
+}
+
+const part1 = (rawInput) => {
+  const input = parseInput(rawInput)
+  const pos = input.reduce(
+    (acc, [command, val]) => actions[command](acc, val),
+    [0, 0],
+  )
+  return pos[0] * pos[1]
+}
+
+const part2 = (rawInput) => {
+  const input = parseInput(rawInput)
+  const pos = input.reduce(
+    (acc, [command, val]) => actions2[command](acc, val),
+    [0, 0, 0],
+  )
+  return pos[0] * pos[1]
+}
+
+run({
+  part1: {
+    tests: [
+      {
+        input: `forward 5
+down 5
+forward 8
+up 3
+down 8
+forward 2`,
+        expected: 150,
+      },
+    ],
+    solution: part1,
+  },
+  part2: {
+    tests: [
+      {
+        input: `forward 5
+down 5
+forward 8
+up 3
+down 8
+forward 2`,
+        expected: 900,
+      },
+    ],
+    solution: part2,
+  },
+  trimTestInputs: true,
+})