Citadel vs Yandex Interview Questions
Citadel lists 101 LeetCode interview questions while Yandex lists 128. They share 23 problems — 23% of Citadel's bank and 18% of Yandex's. Focus on the overlap first, then drill into 78 Citadel-only and 105 Yandex-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 23 overlapping problems first. These are the highest-yield questions for candidates interviewing at both Citadel and Yandex.
Step 2 — Company-specific depth: Add Citadel-specific problems like Longest Non-decreasing Subarray From Two Arrays, Minimum Knight Moves, Delete and Earn and Yandex-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: Citadel skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
23 Shared Questions
High-priority problems to practice for both Citadel and Yandex.
| Problem | Difficulty |
|---|---|
| Binary Tree Maximum Path Sum | Hard |
| Sliding Window Maximum | Hard |
| LRU Cache | Medium |
| Merge Intervals | Medium |
| Best Time to Buy and Sell Stock | Easy |
| Insert Delete GetRandom O(1) | Medium |
| Evaluate Reverse Polish Notation | Medium |
| Number of Islands | Medium |
| Meeting Scheduler | Medium |
| Find Median from Data Stream | Hard |
| Group Anagrams | Medium |
| Validate Binary Search Tree | Medium |
| Merge k Sorted Lists | Hard |
| Binary Tree Zigzag Level Order Traversal | Medium |
| Trapping Rain Water | Hard |
| Perfect Squares | Medium |
| Letter Combinations of a Phone Number | Medium |
| Median of Two Sorted Arrays | Hard |
| Container With Most Water | Medium |
| Longest Increasing Subsequence | Medium |
| Rotting Oranges | Medium |
| Simplify Path | Medium |
| Subarray Sums Divisible by K | Medium |
Unique to Citadel (78)
Problems in Citadel's list that do not appear at Yandex.
Unique to Yandex (105)
Problems in Yandex's list that do not appear at Citadel.
| Problem | Difficulty |
|---|---|
| Longest Subarray of 1's After Deleting One Element | Medium |
| Summary Ranges | Easy |
| Maximize Distance to Closest Person | Medium |
| Longest Substring Without Repeating Characters | Medium |
| Find K Closest Elements | Medium |
| Subarray Sum Equals K | Medium |
| String Compression | Medium |
| Valid Palindrome II | Easy |
| Move Zeroes | Easy |
| One Edit Distance | Medium |
| Permutation in String | Medium |
| Isomorphic Strings | Easy |
Frequently Asked Questions
How many LeetCode questions do Citadel and Yandex share?
Citadel and Yandex share 23 LeetCode interview questions. 78 problems appear only in Citadel's list and 105 appear only in Yandex's list.
What topics overlap most between Citadel and Yandex?
The most common shared topics between Citadel and Yandex are Array (14 shared questions), Dynamic Programming (5 shared questions), Hash Table (5 shared questions), Sorting (4 shared questions), Breadth-First Search (4 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Citadel or Yandex?
Citadel has 5 Easy, 60 Medium, and 36 Hard questions. Yandex has 51 Easy, 67 Medium, and 10 Hard questions. Citadel has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both Citadel and Yandex?
Start with the 23 shared problems since they cover what both companies ask most often. Then add 20 Citadel-specific and 20 Yandex-specific questions to round out your prep.