1
var findUnsortedSubarray = function (nums) {
2
  let left = 0;
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  let right = nums.length - 1;
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  const target = [...nums].sort((a, b) => a - b);
5

6
  while (left < right && nums[left] === target[left]) left += 1;
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  while (right > left && nums[right] === target[right]) right -= 1;
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  const result = right - left;
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  return result === 0 ? 0 : result + 1;
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};