function solution(people, limit) {
  var answer = 0;
  people.sort((a, b) => b - a);
  const length = people.length;
  let back = people.findIndex((i) => i <= limit / 2);
  back = back === -1 ? length : back;
  let front = back - 1;

  const count = { front: front + 1, back: length - back };
  let isMoreBack = true;
  while (isMoreBack) {
    if (people[front] + people[back] <= limit) {
      answer++;
      front--;
    } else {
      if (back > length - 1 || front < 0) isMoreBack = false;
    }
    back++;
  }

  const extra = count.front - answer + Math.ceil((count.back - answer) / 2);
  answer += extra;

  return answer;
}