publicbooleanisPalindrome(String text){Stringclean=text.replaceAll("\\s+","").toLowerCase();intlength=clean.length();intforward=0;intbackward=length -1;while(backward > forward) {charforwardChar=clean.charAt(forward++);charbackwardChar=clean.charAt(backward--);if(forwardChar != backwardChar)r...
If you are thinking of converting the integer to string, note the restriction of using extra space. You could also try reversing an integer. However, if you have solved the problem "Reverse Integer", you know that the reversed integer might overflow. How would you handle such case? There i...
Sample Solution:Java Code:import java.util.function.Predicate; public class Main { public static void main(String[] args) { // Define the palindrome check lambda expression Predicate < String > isPalindrome = str -> { String reversed = new StringBuilder(str).reverse().toString(); return str...
Java Solution: Runtime beats 58.91% 完成日期:06/06/2017 关键词:HashMap 关键点:对于奇数长度的char,我们也需要把它的 长度 - 1 累加 1classSolution2{3publicintlongestPalindrome(String s)4{5HashMap<Character, Integer> map =newHashMap<>();6intlen = 0;7booleanoddChar =false;89for(charc: s...
Have you consider that the string might be empty? This is a good question to ask during an interview. For the purpose of this problem, we define empty string as valid palindrome. 这道题没什么难的,就是考细心和对java的熟悉了,从两头往中间数,碰到非数字或letter的要跳过。 注意几点 1.当跳过...
public class Solution { public List<List<Integer>> palindromePairs(String[] words) { List<List<Integer>> res = new ArrayList<List<Integer>>(); if(words == null || words.length == 0) return res; HashMap<String, Integer> map = new HashMap<>(); ...
public class Solution { public String longestPalindrome(String s) { // base case if(s == null || s.length() <= 1) return s; // Manacher Algorithm /* new index: 0 1 2 3 4 5 6 old index: # 0 # 1 # 2 # m c i r ...
For example, "A man, a plan, a canal: Panama"is a palindrome. "race a car"isnota palindrome. 去掉全部符号然后前后比较即可。 注意character包含字母和数字。 1publicclassSolution {2publicbooleanisPalindrome(String s) {3//Start typing your Java solution below4//DO NOT write main() function5s...
public static void main(String[] args) { String str = "A man, a plan, a canal: Panama"; System.out.println(isValidPalindrome(str)); } } Diana Du March 6, 2014 at 6:34 pm Hi, I found that there are two redundant lines in your first solution. These two lines ...
class Solution { public boolean validPalindrome(String s) { char[] cs = s.toCharArray(); int lf = 0, rt = s.length() - 1; while (lf < rt) { if (cs[lf] != cs[rt]) return isPalindrome(cs, lf + 1, rt) || isPalindrome(cs, lf, rt - 1); ...