day 6

src/day06/index.ts

@@ -0,0 +1,46 @@
+import run from "aocrunner"
+
+const parseInput = (rawInput: string) => rawInput.trim()
+
+const part1 = (rawInput: string) => {
+  const input = parseInput(rawInput)
+  for (let i = 4; i < input.length; i++) {
+    const window = new Set([...input.slice(i - 4, i)])
+    if (window.size === 4) return i
+  }
+  return -1
+}
+
+const part2 = (rawInput: string) => {
+  const input = parseInput(rawInput)
+  for (let i = 14; i < input.length; i++) {
+    const window = new Set([...input.slice(i - 14, i)])
+    if (window.size === 14) return i
+  }
+  return -1
+}
+
+run({
+  part1: {
+    tests: [
+      { input: `mjqjpqmgbljsphdztnvjfqwrcgsmlb`, expected: 7 },
+      { input: `bvwbjplbgvbhsrlpgdmjqwftvncz`, expected: 5 },
+      { input: `nppdvjthqldpwncqszvftbrmjlhg`, expected: 6 },
+      { input: `nznrnfrfntjfmvfwmzdfjlvtqnbhcprsg`, expected: 10 },
+      { input: `zcfzfwzzqfrljwzlrfnpqdbhtmscgvjw`, expected: 11 },
+    ],
+    solution: part1,
+  },
+  part2: {
+    tests: [
+      { input: `mjqjpqmgbljsphdztnvjfqwrcgsmlb`, expected: 19 },
+      { input: `bvwbjplbgvbhsrlpgdmjqwftvncz`, expected: 23 },
+      { input: `nppdvjthqldpwncqszvftbrmjlhg`, expected: 23 },
+      { input: `nznrnfrfntjfmvfwmzdfjlvtqnbhcprsg`, expected: 29 },
+      { input: `zcfzfwzzqfrljwzlrfnpqdbhtmscgvjw`, expected: 26 },
+    ],
+    solution: part2,
+  },
+  trimTestInputs: true,
+  onlyTests: false,
+})