/**
 * @param {string} s
 * @return {number}
 */

const isPalindrom = s => {
  return s === [...s].reverse().join('');
};
var countSubstrings = function (s) {
  let num = 0;
  for (let i = 0; i < s.length; i++) {
    for (let j = i + 2; j <= s.length; j++) {
      if (isPalindrom(s.substring(i, j))) num++;
    }
  }
  return num + s.length;
};

/**
 * @param {string} s
 * @return {number}
 */


let countPalindrome = (l, r, s) => {
    let result = 0;
    while (l >= 0 && r < s.length && s[l] === s[r]) {
        result++;
        l--;
        r++;
    }
    return result;
}

var countSubstrings = function(s) {
    let result = 0;
    
    for (let i = 0; i < s.length; i++) {
        result += countPalindrome(i, i, s);
        result += countPalindrome(i, i + 1, s);
    }
    
    return result;
};