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Citadel

https://citadel.com

Hedge fund and financial services firm.

Coding Interview Problems for Citadel

93

Problem Statistics

Breakdown of 93 problems.

Difficulty Distribution

Medium (53)

Hard (35)

Recency Distribution

Within 3-6 months (93)

Most Common Tags (Top 7)

Array (56)

Dynamic Programming (26)

String (20)

Breadth-First Search (18)

Hash Table (18)

Depth-First Search (16)

Sorting (13)

3Sum

3-6 months ago

Medium

Topics

Array

Two Pointers

Sorting

Trending

Recent

Alien Dictionary

3-6 months ago

Hard

Topics

Array

String

Depth-First Search

Breadth-First Search

+2 more

Trending

Recent

Asteroid Collision

3-6 months ago

Medium

Topics

Array

Stack

Simulation

Trending

Recent

Basic Calculator

3-6 months ago

Hard

Topics

Math

String

Stack

Recursion

Trending

Recent

Best Position for a Service Centre

3-6 months ago

Hard

Topics

Array

Math

Geometry

Randomized

Trending

Recent

Best Time to Buy and Sell Stock

3-6 months ago

Easy

Topics

Array

Dynamic Programming

Trending

Recent

Best Time to Buy and Sell Stock II

3-6 months ago

Medium

Topics

Array

Dynamic Programming

Greedy

Trending

Recent

Best Time to Buy and Sell Stock III

3-6 months ago

Hard

Topics

Array

Dynamic Programming

Trending

Recent

Best Time to Buy and Sell Stock IV

3-6 months ago

Hard

Topics

Array

Dynamic Programming

Trending

Recent

Binary Tree Maximum Path Sum

3-6 months ago

Hard

Topics

Dynamic Programming

Tree

Depth-First Search

Binary Tree

Trending

Recent

Binary Tree Zigzag Level Order Traversal

3-6 months ago

Medium

Topics

Tree

Breadth-First Search

Binary Tree

Trending

Recent

Bus Routes

3-6 months ago

Hard

Topics

Array

Hash Table

Breadth-First Search

Trending

Recent

Climbing Stairs

3-6 months ago

Easy

Topics

Math

Dynamic Programming

Memoization

Trending

Recent

Combination Sum

3-6 months ago

Medium

Topics

Array

Backtracking

Trending

Recent

Consecutive Numbers Sum

3-6 months ago

Hard

Topics

Math

Enumeration

Trending

Recent