# LeetCode 234. Palindrome Linked List

Description https://leetcode.com/problems/palindrome-linked-list/ Given a singly linked list, determine if it is a palindrome. Example 1: Input: 1->2 Output: false Example…

# LeetCode 38. Count and Say

Description https://leetcode.com/problems/count-and-say/ The count-and-say sequence is the sequence of integers with the first five terms as following: 1. 1 2.…

# LeetCode 242. Valid Anagram

Description https://leetcode.com/problems/valid-anagram/ Given two strings s and t , write a function to determine if t is an anagram of s. Example 1: Input: s = “anagram”,…

# LeetCode 125. Valid Palindrome

Description https://leetcode.com/problems/valid-palindrome/ Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases. Note: For the…

# LeetCode 136. Single Number

Description https://leetcode.com/problems/single-number/ Given a non-empty array of integers, every element appears twice except for one. Find that single one. Note: Your algorithm should have…

# Easy Collection Top Interview Questions

Total 49 Questions. Array Array type of questions were asked in interviews frequently. You will most likely encounter one during…

# LeetCode 36. Valid Sudoku

Description https://leetcode.com/problems/valid-sudoku/ Determine if a 9×9 Sudoku board is valid. Only the filled cells need to be validated according to the following rules: Each…

# LeetCode 48. Rotate Image

Description https://leetcode.com/problems/rotate-image/ You are given an n x n 2D matrix representing an image. Rotate the image by 90 degrees (clockwise). Note: You have…

# LeetCode 283. Move Zeroes

Description https://leetcode.com/problems/move-zeroes/ Given an array nums, write a function to move all 0‘s to the end of it while maintaining the relative…