function isPalindrome(s: string): boolean {
  if (s.length < 1) return false;
  return s.split('').reverse().join('') === s
}

export function longestPalindrome(s: string): string {
  if (s.length < 1 || s.length > 1000) return ""
  if (isPalindrome(s)) return s;
  const sArray = s.split('');
  const palindromeArr = [];
  let auxAcum = "";
  sArray.forEach((item)=> {
    auxAcum += item;
    if(isPalindrome(auxAcum)){
      palindromeArr.push({
        value: auxAcum,
        count: auxAcum.length
      });
    } else {
      if(auxAcum.length > 1) {
        const restAuxAcum = auxAcum.slice(1);
        if(isPalindrome(restAuxAcum)){
          palindromeArr.push({
            value: restAuxAcum,
            count: restAuxAcum.length
          })
        }
      }
    }
  })
  const resultSorted = palindromeArr.sort((a, b) => b.count - a.count);
  return resultSorted[0].value;
}