leetcode.cn/problems/lo 解题思路 回文串只有中间的字符可以是单个的,其余的必须是双数,所以我们先遍历输入的字符串,将它存放在Map<字符,数目>中(由于区分大小写,不然可以借鉴之前的默认27个字母的数组减少空间复杂度) 解题方法 俺这版 class Solution { public int longestPalindrome(String s) {
409. Longest Palindrome FindTabBarSize Given a stringswhich consists of lowercase or uppercase letters, return the length of thelongestpalindromethat can be built with those letters. Letters arecase sensitive, for example,"Aa"is not considered a palindrome. Example 1: Input:s = "abccccdd"Output...
One longest palindrome that can be built is"dccaccd", whose length is 7. classSolution {publicintlongestPalindrome(String s) {if(s ==null|| s.length() == 0) {return0; } Map<Character, Integer> map =newHashMap<>();for(charc : s.toCharArray()) { map.put(c, map.getOrDefault(c...
【leetcode】409. Longest Palindrome problem 409. Longest Palindrome solution1: classSolution {public:intlongestPalindrome(strings) { map<char,int>temp;for(auto it:s) temp[it]++;inteven =0, odd =0, mid=false;for(auto it=temp.begin(); it!=temp.end(); ++it) {if(it->second %2==0)...
One longest palindrome that can be built is"dccaccd", whose length is 7. 1publicclassSolution {2publicintlongestPalindrome(String s) {3if(s==null|| s.length()==0)return0;4int[] count =newint[52];5for(inti=0; i<s.length(); i++) {6charc =s.charAt(i);7if(c < 'a') cou...
classSolution{public:intlongestPalindrome(string s){ unordered_map<char,int> count;for(charc : s) ++count[c];intres =0;boolhasOne =false;for(autod : count) {if(d.second %2==0) res += d.second;else{ res += d.second -1; ...
1classSolution2{3publicintlongestPalindrome(String s)4{5HashMap<Character, Integer> map =newHashMap<>();6intlen = 0;7booleanoddChar =false;89for(charc: s.toCharArray())10map.put(c, map.getOrDefault(c, 0) + 1);111213for(charc: map.keySet())14{15inttemp_len =map.get(c);1617...
思路:先用hash table统计每个字母出现多少次。中间应该是放最长的并出现奇数次的那些字母。例如:abcccdb, ans = bcccb。注意这个情况 aaaccccc,这一题的答案是accccca,而不是ccccc。所以update maxOdd时要将去掉的old maxOdd除以二加到ans里面去。 1classSolution(object):2deflongestPalindrome(self, s):3"""...
leetcode 409. 最长回文串(Longest Palindrome) 目录 题目描述: 示例1: 解法: 题目描述: 给定一个包含大写字母和小写字母的字符串,找到通过这些字母构造成的最长的回文串。 在构造过程中,请注意区分大小写。比如"Aa"不能当做一个回文字符串。 注意:
classSolution {public:intlongestPalindrome(strings) { unordered_map<char,int>m;for(charc :s) m[c]++;intres =0;intodd =0;for(auto it = m.begin(); it != m.end(); it++) {if(it->second %2==0) { res+= it->second;