/h/slackernews House Vampire
justcool393 her/she :marstolfo: you are loved :marseybow:  1yr ago (youtube.com) 533 thread views #132979

day 20 aoc: the cupid shuffle

https://youtube.com/watch?v=h24_zoqu4_Q

to the right to the right to the right

to the left to the left to the left

post your aoc solutions for day 20 or smth, all checks notes 5+ of you

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const p1 = true
let obj = fs.readFileSync('/tmp/d201','utf8').split('\n').filter(a=>a.length).map((a,i)=> ({a:p1 ? +a : (+a)*811589153,i}))
for (let x=0;x<(p1 ? 1 : 10);x++)
for (let i=0;i<obj.length;i++){
  const k = obj.findIndex(a=> a.i === i)
  const a = obj[k]
  let newi = a.a + k
  if (newi < 0) newi += Math.ceil(-newi/(obj.length-1))*(obj.length-1)
  newi %= (obj.length - 1)
  if (newi == 0) newi = obj.length
  obj = obj.slice(0, k).concat(obj.slice(k+1))
  obj = obj.slice(0, newi).concat([a]).concat(obj.slice(newi))
}
const i = obj.map(a=>a.a).indexOf(0)
out:(obj[(i+1000)%obj.length].a+obj[(i+2000)%obj.length].a+obj[(i+3000)%obj.length].a)
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