day 19, my fastest times yet!

.aocrunner.json

@@ -286,16 +286,16 @@
     },
     {
       "part1": {
-        "solved": false,
-        "result": null,
+        "solved": true,
+        "result": "371",
         "attempts": [],
-        "time": null
+        "time": 1.906905
       },
       "part2": {
-        "solved": false,
-        "result": null,
+        "solved": true,
+        "result": "650354687260341",
         "attempts": [],
-        "time": null
+        "time": 171.177121
       }
     },
     {

README.md

@@ -29,7 +29,7 @@
 [![Day](https://badgen.net/badge/16/%E2%98%85%E2%98%85/green)](src/day16)
 [![Day](https://badgen.net/badge/17/%E2%98%85%E2%98%85/green)](src/day17)
 [![Day](https://badgen.net/badge/18/%E2%98%85%E2%98%85/green)](src/day18)
-![Day](https://badgen.net/badge/19/%E2%98%86%E2%98%86/gray)
+[![Day](https://badgen.net/badge/19/%E2%98%85%E2%98%85/green)](src/day19)
 ![Day](https://badgen.net/badge/20/%E2%98%86%E2%98%86/gray)
 ![Day](https://badgen.net/badge/21/%E2%98%86%E2%98%86/gray)
 ![Day](https://badgen.net/badge/22/%E2%98%86%E2%98%86/gray)
@@ -188,16 +188,16 @@ Both parts: 8772.994ms
 
 ```
 Day 18
-Time part 1: 26.466ms
-Time part 2: 1115.347ms
-Both parts: 1141.812ms
+Time part 1: 27.726ms
+Time part 2: 15841.686ms
+Both parts: 15869.412ms
 ```
 
 ```
 Day 19
-Time part 1: -
-Time part 2: -
-Both parts: -
+Time part 1: 1.907ms
+Time part 2: 171.177ms
+Both parts: 173.084ms
 ```
 
 ```
@@ -243,8 +243,8 @@ Both parts: -
 ```
 
 ```
-Total stars: 36/50
-Total time: 161581.562ms
+Total stars: 38/50
+Total time: 176482.246ms
 ```
 
 <!--/RESULTS-->

src/day19/README.md

@@ -0,0 +1,9 @@
+# 🎄 Advent of Code 2024 - day 19 🎄
+
+## Info
+
+Task description: [link](https://adventofcode.com/2024/day/19)
+
+## Notes
+
+...

src/day19/index.ts

@@ -0,0 +1,85 @@
+import run from "aocrunner"
+
+const parseInput = (rawInput: string) => {
+  const [a,b] = rawInput.split('\n\n')
+  const towels = a.split(', ')
+  const patterns = b.split('\n')
+  return {
+    towels,
+    patterns,
+  }
+}
+
+const part1 = (rawInput: string) => {
+  const {towels, patterns} = parseInput(rawInput)
+  const reg = new RegExp(`^(${towels.join('|')})+$`)
+  return patterns.reduce((total, pattern) => {
+    return total + (reg.test(pattern) ? 1 : 0)
+  }, 0)
+}
+
+const part2 = (rawInput: string) => {
+  const {towels, patterns} = parseInput(rawInput)
+  return patterns.reduce((total, pattern) => {
+    const cache = new Map<number, number>()
+    const ways = (index: number) => {
+      if (cache.has(index)) {
+        return cache.get(index)
+      }
+      if (index === pattern.length) {
+        cache.set(index, 1)
+        return 1
+      }
+      const ans = towels.reduce((total2, t) => {
+        if (pattern.slice(index,index+t.length) === t) {
+          return total2 + ways(index + t.length)
+        }
+        return total2
+      }, 0)
+      cache.set(index, ans)
+      return ans
+    }
+    return total + ways(0)
+  }, 0)
+}
+
+run({
+  part1: {
+    tests: [
+      {
+        input: `r, wr, b, g, bwu, rb, gb, br
+
+brwrr
+bggr
+gbbr
+rrbgbr
+ubwu
+bwurrg
+brgr
+bbrgwb`,
+        expected: 6,
+      },
+    ],
+    solution: part1,
+  },
+  part2: {
+    tests: [
+      {
+        input: `r, wr, b, g, bwu, rb, gb, br
+
+brwrr
+bggr
+gbbr
+rrbgbr
+ubwu
+bwurrg
+brgr
+bbrgwb`,
+        expected: 16,
+      },
+    ],
+    solution: part2,
+  },
+  trimTestInputs: true,
+  onlyTests: false,
+})