publicbooleanisPalindrome(Strings){if(s==null){returnfalse;}s=s.toLowerCase();inti=0;intj=s.length()-1;while(i<j){while(i<j&&!((s.charAt(i)>='a'&&s.charAt(i)<='z')||(s.charAt(i)>='0'&&s.charAt(i)<='9'))){i++;}while(i<j&&!((s.charAt(j)>='a'&&s.charAt(j...
public class NumArray { private int[] sums; public NumArray(int[] nums) { sums = new int[nums.length]; int sum = 0; for (int i=0; i<nums.length; i++) { sum += nums[i]; sums[i] = sum; } } public int sumRange(int i, int j) { int toMinus = 0; if (i>0) toMi...
122 O(1) Check Power of 2.java N/A Java [] 123 Paint Fence.java N/A Java [] 124 Palindrome Linked List.java N/A Java [] 125 Palindrome Partitioning.java N/A Java [] 126 Palindrome Permutation II.java Medium Java [] 127 Palindrome Permutation.java Easy Java [] 128 Partit...
N/A Shortest Palindrome.java Hard [KMP, String] Java 119 N/A Convert Sorted Array to Binary Search Tree.java Easy [DFS, Divide and Conquer, Tree] Java 120 N/A Populating Next Right Pointers in Each Node.java Medium [DFS, Divide and Conquer, Tree] Java 121 N/A Space Replacement.java...
Palindrome Partitioning。 当然,还有一部分问题可能需要一些数学知识去解决,或者是需要一些位运算的技巧去快速解决。总之,我们希望找到时间复杂度低的解决方法。为了达到这个目的,我们可能需要在一个解题方法中融合多种思想,比如在 300. Longest Increasing Subsequence 中同时用到了动态规划和二分查找的方法,将复杂度控制...
20, Valid Palindrome: 判断String是否是对称的,只考虑a-z 0-9,特别的是可以将原String用replaceAll(String regex, String replace)来去除掉特别字符,例如String test2 = test.replaceAll("[^a-zA-Z0-9]", ""); 或是test.replaceAll("\\W", ""); ...
九章算法ACM金牌选手令狐老师对大厂算法面试中的常考题型进行了分类,给出了刷leetcode通用解题思路和代码模板,不少同学已经通过这份leetcode算法小抄拿到了亚麻、谷歌、字节等offer。(点击下方链接,试听课程即可免费领取模版) 盲目花大量时间刷题,不如背一遍这份北大学霸的算法刷题模板!下图的二分法模板,就是一个可以...
Java实现 1classSolution {2publicbooleancheckPalindromeFormation(String a, String b) {3returncheck(a, b) ||check(b, a);4}56privatebooleancheck(String a, String b) {7inti = 0;8intj = a.length() - 1;9while(i < j && a.charAt(i) ==b.charAt(j)) {10i++;11j--;12}13returnis...
As an added challenge, try to code it using only iterators in C++ or iterators in Java. 【解答】只有二维,那问题就不麻烦,用两个指针,一个 p,一个 q,分别指向第一维的位置和第二维的位置。定一个一个 check 方法,用来保持指针指向的位置是有意义的。 代码语言:javascript 代码运行次数:0 运...
The fine-tuned Code Llama model, in addition to providing the code for the preceding query, generates a detailed explanation of the approach and a pseudo code. Code Llama 34b Python Non-Fine-Tuned Response: ### CodedeflongestPalindrome(s):# Fill this in.longest=""foriinrange(len(s)):fo...