Citadel Interview ExperienceTop citadel interview questionsS.NoInterview QuestionNumber of times candidates experienced this question in interviews1First Repeating Element153642Find the Maximum Repeating Number in Array101723Best Time to Buy and Sell Stock LeetCode Solution83334A Product Array Puzzle80095Group Anagrams LeetCode Solution72446Asteroid Collision LeetCode Solution71397Product of Array Except Self LeetCode Solution66458Trapping Rain Water Leetcode Solution59789Word Ladder LeetCode Solution589310Coin Change 2 Leetcode Solution587911Insert Delete GetRandom O(1) Leetcode Solution554112Maximum Product of Three Numbers LeetCode Solution543313Printing brackets in Matrix Chain Multiplication Problem535514Find Triplet in Array With a Given Sum519115Time Based Key-Value Store LeetCode Solution514916Construct Binary Tree from Given Inorder and Preorder Traversals513517Pairs of Songs With Total Durations Divisible by 60 LeetCode Solution465318Three way partitioning of an array around a given range464219Length of Longest valid Substring452720Count of index pairs with equal elements in an array452121Count of Triplets With Sum Less than Given Value422622Minimum operation to make all elements equal in array413523Ugly Number II LeetCode Solution407824Check if a given array contains duplicate elements within k distance from each other404325LRU Cache Implementation402726Longest subarray not having more than K distinct elements401827Priority Queue using doubly linked list395328Kth Smallest Element in a BST Leetcode Solution394929LRU Cache Leetcode Solution392530Difference between highest and least frequencies in an array3912