var longestPalindrome = function(s) {
let trackkerObject = new Map();
let n = 0;
for (let i = 0; i < s.length; i++) {
if (trackkerObject.has(s[i])) {
n += 2;
trackkerObject.delete(s[i]);
} else {
trackkerObject.set(s[i], i);
}
}
return trackkerObject.size > 0 ? n+1 : n;
};
console.log(longestPalindrome("abccccdd"));
Longest Palindrome
![](https://media.dev.to/cdn-cgi/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F908014%2F7380b9e6-bf31-41ae-bc8e-bd379ad2a5c9.jpeg)