day09/index.js

@@ -1,67 +0,0 @@
-import { readFileSync } from "fs";
-
-const input = readFileSync("movements.txt", "utf-8");
-
-function isTailAdjacentToHead(head, tail) {
-    if(Math.abs(tail.x - head.x) > 1) return false;
-    if(Math.abs(tail.y - head.y) > 1) return false;
-    return true;
-}
-
-const initX = 11, initY = 5;
-const rope = [
-    { x: initX, y: initY },
-    { x: initX, y: initY },
-    { x: initX, y: initY },
-    { x: initX, y: initY },
-    { x: initX, y: initY },
-    { x: initX, y: initY },
-    { x: initX, y: initY },
-    { x: initX, y: initY },
-    { x: initX, y: initY },
-    { x: initX, y: initY }
-];
-
-const visited = new Map();
-
-input.split('\n').forEach(line => {
-    const operations = line.split(' ');
-
-    let x = 0, y = 0;
-
-    switch(operations[0]) {
-        case "U":
-            y++;
-            break;
-        case "D":
-            y--;
-            break;
-        case "L":
-            x--;
-            break;
-        case "R":
-            x++;
-            break;
-    }
-
-    for(let i = 0; i < parseInt(operations[1]); i++) {
-        rope[0].x += x;
-        rope[0].y += y;
-
-        for(let ropeIndex = 1; ropeIndex < rope.length; ropeIndex++) {
-            if(!isTailAdjacentToHead(rope[ropeIndex - 1], rope[ropeIndex])) {
-                if(rope[ropeIndex - 1].x !== rope[ropeIndex].x && rope[ropeIndex - 1].y !== rope[ropeIndex].y) {
-                    rope[ropeIndex].x += (rope[ropeIndex - 1].x - rope[ropeIndex].x) > 0 ? 1 : -1;
-                    rope[ropeIndex].y += (rope[ropeIndex - 1].y - rope[ropeIndex].y) > 0 ? 1 : -1;
-                } else if(rope[ropeIndex - 1].x === rope[ropeIndex].x) {
-                    rope[ropeIndex].y += (rope[ropeIndex - 1].y - rope[ropeIndex].y) > 0 ? 1 : -1;
-                } else if(rope[ropeIndex - 1].y === rope[ropeIndex].y) {
-                    rope[ropeIndex].x += (rope[ropeIndex - 1].x - rope[ropeIndex].x) > 0 ? 1 : -1;
-                }
-            }            
-        }
-        visited.set(`${rope[rope.length - 1].x}:${rope[rope.length - 1].y}`, true);
-    }   
-});
-
-console.log(visited.size);