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/h/slackernews House Vampire
justcool393 her/she :marstolfo: you are loved :marseybow:  1yr ago (text post) 592 thread views #131561

day 15 thread of aoc i guess lol: diamonds are forever

see leaderboard on geeses post

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asscript:

type str = string;
type Arr<T> = Array<T>;

class Pnt {
  x: i32; y:i32;
  constructor(x:i32, y:i32) {this.x=x; this.y=y};
  toString():str { return `${this.x},${this.y}`};
};

function calcDst(a:Pnt, b:Pnt): i32 {
  return i32(Math.abs(a.x-b.x)) + i32(Math.abs(a.y-b.y));
}

class SnrDat {
  snrPnt: Pnt;
  bcnPnt: Pnt;
  dst: i32;
  constructor(sX:i32, sY:i32, bX:i32, bY:i32){
    this.snrPnt = new Pnt(sX, sY);
    this.bcnPnt = new Pnt(bX, bY);
    this.dst = calcDst(this.snrPnt, this.bcnPnt);
  };
  toString():str {
    return `S:${this.snrPnt} B:${this.bcnPnt} dst:${this.dst}`;
  };
  excludesPnt(p:Pnt): boolean {
    if (p.x === this.bcnPnt.x && p.y === this.bcnPnt.y) return false;
    const dst = calcDst(this.snrPnt,p);
    return dst<=this.dst;
  }
}

function setup(input:str): Array<SnrDat> {
  const strLines: Arr<str> = input.split('\n');
  return strLines.map<SnrDat>((l:str) => {
    const n = l.split(',').map((s:str) => i32.parse(s));
    const sX = n[0], sY = n[1], bX = n[2], bY = n[3]
    return new SnrDat(sX, sY, bX, bY);
  });
}

const p = new Pnt(0,0);
export function run(inputData:str, maxDir:str):void {
  const snrData = setup(inputData);
  const max = i32.parse(maxDir);
  while(true) {
    const search = snrData.findIndex(dat => dat.excludesPnt(p));
    if (search == -1) break;
    const excDat = snrData[search];
    p.x = excDat.snrPnt.x + (excDat.dst - i32(Math.abs(p.y - excDat.snrPnt.y))) + 1;
    if (p.x > max) {
      p.x = 0; p.y = p.y+1;
    }
    if (p.y > max) {
      break;
    }
  }

  console.log(
    (u64(p.x) * 4000000 + p.y).toString()
  );
};

calling typescript:

import * as fs from 'fs';
import {run} from '../build/release.js';

const input = fs.readFileSync(process.argv[2], 'utf-8').split('\n').map(l =>
  [...l.matchAll(/[x,y]=(-*\d+)+/g)].map(m => Number(m[1]))
);
run(
  input.map(l => l.join(',')).join('\n'),
  process.argv[3]
);
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