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Discussion on: Daily Challenge #55 - Building a Pile of Cubes

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Dominik G • • Edited

Ok, now I got a solution thanks to Wolfram Alpha:

const f = m => {
  var n = (Math.sqrt(8 * Math.sqrt(m) + 1) - 1) / 2;
  return n === Math.floor(n) ? n : 0;
};