d3p1

src/day3/index.ts

@@ -0,0 +1,23 @@
+import path from 'path';
+import { readFile } from "../utils";
+
+let input = readFile(path.resolve(__dirname, 'input.txt'));
+
+const size = input[0].length;
+let bucket = Array(size).fill(0).map(x => Object.assign({}, [0, 0]));
+
+input
+    .map((x: string) => {
+        x.split('')
+            .map((c, idx: number) => {
+                if (c === '0') bucket[idx][0]++; else bucket[idx][1]++
+            })
+    })
+
+let gamma = parseInt(bucket.map(x => x[0] < x[1] ? "0" : "1").join(""), 2)
+let eps = parseInt(bucket.map(x => x[0] < x[1] ? "1" : "0").join(""), 2)
+
+const power = gamma * eps;
+
+console.log("Part 1: ", power);
+