摘要：
var lengthOfLongestSubstring = function(s) { let arr = s.split('') let length = 0 let num = 0 arr.forEach((item,index)=>{ let strArr = [] for(let i=in 阅读全文
摘要：
var longestPalindrome = function(s) { let start = (new Date()).valueOf() let arr = s.split('') let length = s.length let num = 0 let str = '' function 阅读全文