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De-shaw Master DSA Sheet

This compilation contains exclusive, previously asked data structure and algorithm questions from real De-shaw interviews. Focus on these core problem patterns to confidently tackle even the hardest interview challenges.

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Open the Lock
Medium
Using a Robot to Print the Lexicographically Smallest String
Medium
Valid Parentheses
Easy
Maximum Side Length of a Square with Sum Less than or Equal to Threshold
Medium
Asteroid Collision
Medium
Design A Leaderboard
Medium
Furthest Building You Can Reach
Medium
Painting the Walls
Hard
Koko Eating Bananas
Medium
Maximum Product Subarray
Medium
Longest Substring Without Repeating Characters
Medium
Generate Parentheses
Medium
Trapping Rain Water6 Months
Hard
Copy List with Random Pointer
Medium
Longest String Chain6 Months
Medium
Split Array Largest Sum
Hard
Next Permutation
Medium
Minimum Number of Visited Cells in a Grid
Hard
Number of Ways to Wear Different Hats to Each Other
Hard
Determine the Winner of a Bowling Game
Easy
Minimize Connected Groups by Inserting Interval
Medium
Sum Game
Medium
Maximum Strength of K Disjoint Subarrays
Hard
Basic Calculator II
Medium
Maximum Number of Subsequences After One Inserting6 Months
Medium
Find the Maximum Divisibility Score
Easy
Count the Number of Incremovable Subarrays II
Hard
Task Scheduler
Medium
Swim in Rising Water
Hard
Query Kth Smallest Trimmed Number
Medium
Maximum Width Ramp
Medium
Maximum Points Tourist Can Earn
Medium
Wildcard Matching
Hard
Removing Minimum Number of Magic Beans
Medium
Maximum Deletions on a String
Hard
Minimum Runes to Add to Cast Spell
Hard
Find Peak Calling Hours for Each City
Medium
Median of a Row Wise Sorted Matrix
Medium
Minimum Size Subarray in Infinite Array
Medium
Number of Subarrays With AND Value of K
Hard
Maximum Points After Collecting Coins From All Nodes
Hard
Insert Delete GetRandom O(1)
Medium
Rotting Oranges6 Months
Medium
Heaters
Medium
Combination Sum
Medium
Longest Valid Parentheses
Hard
Loud and Rich
Medium
Minimum Number of Refueling Stops
Hard
Merge Sorted Array
Easy
Maximum Subarray
Medium
Number of Islands
Medium
Word Search II
Hard
Count Binary Substrings
Easy
Maximal Square
Medium
Average Waiting Time
Medium
Two Sum
Easy
Number of Ways to Select Buildings
Medium
LRU Cache
Medium
Binary Tree Cameras3 Months
Hard
Find the Smallest Divisor Given a Threshold
Medium
Best Time to Buy and Sell Stock II
Medium
Maximize Score of Numbers in Ranges
Medium
Remove Max Number of Edges to Keep Graph Fully Traversable
Hard
Median of Two Sorted Arrays
Hard
Find the Duplicate Number
Medium
Best Time to Buy and Sell Stock
Easy
Decode Ways
Medium
Largest Rectangle in Histogram
Hard
Maximal Rectangle
Hard
Majority Element
Easy
Letter Combinations of a Phone Number
Medium
Cheapest Flights Within K Stops
Medium
Validate Binary Search Tree
Medium
Maximum Points You Can Obtain from Cards
Medium
Minimum Size Subarray Sum
Medium
House Robber II
Medium
Longest Consecutive Sequence
Medium
Reorganize String
Medium
Sliding Window Maximum
Hard
Coin Change II
Medium
Remove Duplicate Letters
Medium
4Sum
Medium
House Robber
Medium
Best Time to Buy and Sell Stock IV
Hard
Text Justification
Hard
Minimum Cost to Make at Least One Valid Path in a Grid
Hard
Number of Substrings Containing All Three Characters
Medium
Excel Sheet Column Title
Easy
Relative Sort Array
Easy
Find Triangular Sum of an Array
Medium
Consecutive Numbers Sum
Hard
Unique Paths
Medium
Candy
Hard
Find First and Last Position of Element in Sorted Array
Medium
Shortest Subarray to be Removed to Make Array Sorted
Medium
Peak Index in a Mountain Array
Medium
Minimum Number of Taps to Open to Water a Garden
Hard
K-th Smallest in Lexicographical Order
Hard
Minimum Cost to Merge Stones
Hard
Max Number of K-Sum Pairs
Medium
Maximum Performance of a Team
Hard
Number of Ways to Reorder Array to Get Same BST
Hard
Flatten Nested List Iterator
Medium
Put Marbles in Bags
Hard
Kth Smallest Number in Multiplication Table6 Months
Hard
Max Sum of Rectangle No Larger Than K
Hard
Linked List Cycle
Easy
Sum of Subarray Ranges
Medium
Maximum OR
Medium
Implement Rand10() Using Rand7()
Medium
Maximum Subsequence Score
Medium
Find the Sum of the Power of All Subsequences
Hard
Knight Dialer
Medium
Minimum Number of Pushes to Type Word II
Medium
Equal Row and Column Pairs
Medium
Minimum Cost Walk in Weighted Graph
Hard
Maximum Number of Points with Cost
Medium
K-th Symbol in Grammar
Medium
Take Gifts From the Richest Pile
Easy
Greatest Sum Divisible by Three
Medium
Minimum Deletions to Make String K-Special
Medium
Find Minimum Cost to Remove Array Elements
Medium
Find the Shortest Superstring
Hard
Shortest String That Contains Three Strings
Medium