function part1(inputText) {
  const [freshRangeDefs, availableIds] = inputText.trim().split('\n\n');
  const parsedIds = new Set(availableIds.trim().split('\n').map(strId => Number.parseInt(strId, 10)));
  const parsedRanges = freshRangeDefs.trim().split('\n').map(rangeDef => rangeDef.split('-').map(strBound => Number.parseInt(strBound, 10)));

  for (const id of parsedIds) {
    let fresh = false;
    for (const [lowerBound, upperBound] of parsedRanges) {
      if (lowerBound <= id && id <= upperBound) {
        fresh = true;
        break;
      }
    }
    if (!fresh) {
      parsedIds.delete(id)
    }
  }
  return parsedIds.size;
}

{
  const start = performance.now();
  const result = part1(document.body.textContent);
  const end = performance.now();
  console.info({
    day: 5,
    part: 1,
    time: end - start,
    result
  });
}

function part2(inputText) {
  const [freshRangeDefs] = inputText.trim().split('\n\n');
  const parsedRanges = freshRangeDefs.trim().split('\n').map(rangeDef => rangeDef.split('-').map(strBound => Number.parseInt(strBound, 10)));
  parsedRanges.sort(([lowerA, upperA], [lowerB, upperB]) => lowerA - lowerB);
  const merged = [parsedRanges[0]];
  for (const [parsedLower, parsedUpper] of parsedRanges) {
    let inserted = false;
    for (let mIndex = 0; mIndex < merged.length; mIndex++) {
      const [mLower, mUpper] = merged[mIndex];
      if (mUpper < parsedLower) {
        // parsed is completely "above" merged
        continue
      } else if (parsedUpper < mLower) {
        // parsed is completely "below" merged
        merged.splice(mIndex, 0, [parsedLower, parsedUpper]);
        inserted = true;
        break;
      } else {
        // parsed and merged intersect somehow/somewhere)
        merged[mIndex][0] = Math.min(parsedLower, mLower)
        merged[mIndex][1] = Math.max(parsedUpper, mUpper)
        inserted = true;
        break;
      }
    }
    if (!inserted) {
      // parsed is completely "above" ALL already-merged ranges
      merged.push([parsedLower, parsedUpper]);
    }
  }
  return merged.reduce((accu, [lower, upper]) => accu + upper - lower + 1, 0)
}
{
  const exampleText = `3-5
10-14
16-20
12-18

1
5
8
11
17
32
`
  const start = performance.now();
  //   const result = part2(exampleText);
  const result = part2(document.body.textContent);
  const end = performance.now();
  console.info({
    day: 5,
    part: 2,
    time: end - start,
    result
  });
}