Fair Distribution of Cookies LeetCode solution in JavaScript

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var distributeCookies = function (cookies, k) {
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  cookies.sort((a, b) => b - a);
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  if (k === cookies.length) return cookies[0];
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  const arr = new Array(k).fill(0);
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  let res = Infinity;
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  function helper(arr, cookies, level) {
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    if (level === cookies.length) {
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      const max = Math.max(...arr);
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      res = Math.min(res, max);
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      return;
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    }
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    const cookie = cookies[level];
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    for (let i = 0; i < arr.length; i++) {
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      arr[i] += cookie;
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      helper(arr, cookies, level + 1);
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      arr[i] -= cookie;
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    }
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  }
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  helper(arr, cookies, 0);
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  return res;
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};