Day 11 Part 1

2024/11/index.ts

@@ -0,0 +1,37 @@
+const fs = require('fs');
+
+const input = fs.readFileSync(__dirname + '/input.txt', 'utf8');
+
+let stones: Array<string> = input.slice(0, -1).split(' ');
+
+let sum = 0;
+
+function splitStones(stones: Array<string>) {
+    const newStones: Array<string> = [];
+    stones.forEach((stone) => {
+        if (stone === '0') {
+            newStones.push('1');
+            return;
+        }
+        const len = stone.length;
+        if (len % 2 === 0) {
+            newStones.push(stone.slice(0, len / 2));
+            let last = stone.slice(len / 2);
+            newStones.push(''+(parseInt(last)));
+            return;
+        }
+        newStones.push(''+(parseInt(stone) * 2024));
+    });
+    return newStones;
+}
+
+let newStones = stones;
+
+const blinks = 25;
+
+for (let i = 0; i < blinks; i++) {
+    newStones = splitStones(newStones);
+}
+
+console.log(newStones.length);
+