WIP-Day 9

Day 09/Part 1/index.ts

@@ -0,0 +1,37 @@
+import fs from 'node:fs';
+
+export default function runner(input: string) {
+
+  const fsblk: number[]= []
+
+  let id = 0;
+  fs.readFile(`./${input}`, 'utf8', (err, data) => {
+    if (err) throw err;
+    for (let i = 0; i < data.length; i++) {
+      for(let j = 0; j < parseInt(data.charAt(i)); j++) {
+        if(i%2 == 0){
+          fsblk.push(id)
+        } else {
+          fsblk.push(-1)
+        }
+      }
+      if(i%2 == 0) id++;
+    }
+
+    for (let i = 0; i < fsblk.length; i++) {
+      while(fsblk[i] === -1) fsblk[i] = fsblk.pop()??-1
+    }
+
+    // console.log(fsblk)
+
+    let checksum = 0;
+
+    fsblk.forEach((value, index) => {
+      checksum += value*index
+      // console.log(`${value} * ${index} = ${value*index} (total: ${checksum}`)
+    })
+
+    console.log(checksum)
+
+  })
+}