let,const vs var (v2)

/**
 * @param {string} s
 * @return {string}
 */
var longestPalindrome = function(s) {

    if (s.length == 0){
        return s;
    }

    // f[i][j] = f[i + 1][j - 1] && str[i] == str[j]
    var f = new Array(s.length);
    for (var i = 0; i < s.length; ++ i) {
        f[i] = new Int8Array(s.length);
        f[i][i] = 1;

        if (i > 0) f[i][i - 1] = 1;
    }

    var maxLen = 1;
    var result = s[0];

    for (var len = 2; len <= s.length; ++ len) {
        for (var i = 0; i <= s.length - len; ++ i) {
            var j = i + len - 1;
            f[i][j] = (f[i + 1][j - 1] && s[i] == s[j]) ? 1 : 0;

            if (f[i][j]) {
                maxLen = len;
                result = s.slice(i, j + 1);
            }
        }
    }

    return result;
};

console.log(longestPalindrome("nmngaowrbsssvihklwmuqshcddwlxrywrlwtennwfvrevgvhsvgeccfulmuvrcksdmgeqrblnlwoepefhcwhmgyvgcoyyygrmttyfycxwbqktpurlcfhzlakhmrddsydgygganpmaglaxyhfwjusukzcnakznygqplngnkhcowavxoiwrfycxwdkxqfcjqwyqutcpyedbnuogedwobsktgioqdczxhikjrbkmqspnxcpngfdwdaboscqbkwforihzqdcppxjksiujfvlpdjryewaxgmdgigvxdlstxwngtbdrrkfudjinzyxbdmkautclvvyguekuzwwetmsxittgtxbnvvrgasvnlogdiepltweaehubwelznidltzlbzdsrxmhjpkmylnwkdsxnpkplkdzywioluaqguowtbaoqzqgjfewphqcvlnwlojbxgomvxxkhwwykawegxubjiobizicuxzeafgautefsurgjlbhcfevqzsbhwxycrcaibdsgluczcuewzqupakbzmcvzsfodbmgtugnihyhqkvyeboqhqldifbxuaxqzxtyejoswikbzpsvzkxcndgeyvfnyrfbkhlalzpqjueibnodamgpnxlkvwvliouvejcpnakllfxepldfmdzszagkyhdgqqbkb"))
console.log(longestPalindrome("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggg"))



 

/**
 * @param {string} s
 * @return {string}
 */
var longestPalindrome2 = function(s) {
    "use strict";

    if (s.length == 0){
        return s;
    }

    // f[i][j] = f[i + 1][j - 1] && str[i] == str[j]
    const f = new Array(s.length);
    for (let i = 0; i < s.length; ++ i) {
        f[i] = new Int8Array(s.length);
        f[i][i] = 1;

        if (i > 0) f[i][i - 1] = 1;
    }

    let maxLen = 1;
    let result = s[0];

    for (let len = 2; len <= s.length; ++ len) {
        for (let i = 0; i <= s.length - len; ++ i) {
            const j = i + len - 1;
            f[i][j] = (f[i + 1][j - 1] && s[i] == s[j]) ? 1 : 0;

            if (f[i][j]) {
                maxLen = len;
                result = s.slice(i, j + 1);
            }
        }
    }

    return result;
};

console.log(longestPalindrome2("nmngaowrbsssvihklwmuqshcddwlxrywrlwtennwfvrevgvhsvgeccfulmuvrcksdmgeqrblnlwoepefhcwhmgyvgcoyyygrmttyfycxwbqktpurlcfhzlakhmrddsydgygganpmaglaxyhfwjusukzcnakznygqplngnkhcowavxoiwrfycxwdkxqfcjqwyqutcpyedbnuogedwobsktgioqdczxhikjrbkmqspnxcpngfdwdaboscqbkwforihzqdcppxjksiujfvlpdjryewaxgmdgigvxdlstxwngtbdrrkfudjinzyxbdmkautclvvyguekuzwwetmsxittgtxbnvvrgasvnlogdiepltweaehubwelznidltzlbzdsrxmhjpkmylnwkdsxnpkplkdzywioluaqguowtbaoqzqgjfewphqcvlnwlojbxgomvxxkhwwykawegxubjiobizicuxzeafgautefsurgjlbhcfevqzsbhwxycrcaibdsgluczcuewzqupakbzmcvzsfodbmgtugnihyhqkvyeboqhqldifbxuaxqzxtyejoswikbzpsvzkxcndgeyvfnyrfbkhlalzpqjueibnodamgpnxlkvwvliouvejcpnakllfxepldfmdzszagkyhdgqqbkb"))
console.log(longestPalindrome2("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggg"))