day 25 part 1 done

2024/25/example.txt

@@ -0,0 +1,39 @@
+#####
+.####
+.####
+.####
+.#.#.
+.#...
+.....
+
+#####
+##.##
+.#.##
+...##
+...#.
+...#.
+.....
+
+.....
+#....
+#....
+#...#
+#.#.#
+#.###
+#####
+
+.....
+.....
+#.#..
+###..
+###.#
+###.#
+#####
+
+.....
+.....
+.....
+#....
+#.#..
+#.#.#
+#####

2024/25/index.js

@@ -0,0 +1,57 @@
+import fs from 'node:fs'
+
+function init(filename) {
+    const data = fs.readFileSync(filename, { encoding: 'utf-8' }, data => data)
+    const reader = new Reader()
+    data.split('\n\n').forEach(schematic => reader.readSchematics(schematic))
+    reader.part1()
+}
+
+class Reader {
+    constructor() {
+        this.Keys = []
+        this.Locks = []
+    }
+
+    getHeights(schematic) {
+        const lines = schematic.split('\n')
+        let pins = 0
+        let pin = [0, 0, 0, 0, 0]
+        while (pins < 5) {
+            let height = 0
+            for (let row = 0; row < lines.length; row++) {
+                if (lines[row][pins] === '#') pin[pins] += 1
+            }
+            pins++
+        }
+        return pin.map(p => p - 1).join(",")
+    }
+    fits(key, lock) {
+        const k = key.split(',').map(k => parseInt(k))
+        const l = lock.split(',').map(l => parseInt(l))
+        let fits = true
+        for (let i = 0; i < k.length; i++) {
+            if (k[i] + l[i] > 5) { fits = false }
+        }
+        //console.log(`key ${key} ${fits ? "fits" : "doesn't fit"} into ${lock}`)
+        return fits
+    }
+    readSchematics(schematic) {
+        const isKey = schematic[0] == '.' ? true : false
+        if (isKey) { this.Keys.push(this.getHeights(schematic)) }
+        else { this.Locks.push(this.getHeights(schematic)) }
+
+    }
+    part1() {
+        let foundKeys = 0
+        this.Keys.forEach((key, index) => {
+            this.Locks.forEach((lock, index) => {
+                foundKeys += this.fits(key, lock) ? 1 : 0
+            })
+
+        })
+        console.log(foundKeys)
+    }
+}
+
+init('input.txt')