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Ibm Master DSA Sheet

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

top-specificibm-prep
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170
Course Schedule II
Medium
Alert Using Same Key-Card Three or More Times in a One Hour Period6 Months
Medium
Minimum Time to Type Word Using Special Typewriter
Easy
Meeting Rooms II
Medium
Remove Colored Pieces if Both Neighbors are the Same Color
Medium
Jump Game II
Medium
Min Stack
Medium
Valid Parentheses3 Months
Easy
Minimum Bit Flips to Convert Number
Easy
Find Resultant Array After Removing Anagrams6 Months
Easy
Asteroid Collision
Medium
Grumpy Bookstore Owner6 Months
Medium
Largest Number After Digit Swaps by Parity
Easy
Subarray Product Less Than K
Medium
Spiral Matrix
Medium
Minimum Value to Get Positive Step by Step Sum
Easy
Reverse Linked List
Easy
Longest Substring Without Repeating Characters3 Months
Medium
The Employee That Worked on the Longest Task
Easy
Product of Array Except Self
Medium
Merge Intervals3 Months
Medium
Generate Parentheses6 Months
Medium
Trapping Rain Water3 Months
Hard
Longest Palindromic Substring30 Days
Medium
Next Permutation
Medium
Number of Divisible Substrings
Medium
Divide Intervals Into Minimum Number of Groups
Medium
Sort the Students by Their Kth Score
Medium
Climbing Stairs
Easy
Minimum Operations to Make Median of Array Equal to K
Medium
Find Products of Elements of Big Array
Hard
Maximum Profitable Triplets With Increasing Prices II
Hard
Find the Array Concatenation Value
Easy
Minimum Levels to Gain More Points
Medium
Maximum Profitable Triplets With Increasing Prices I
Medium
Average Value of Even Numbers That Are Divisible by Three
Easy
Count the Number of Incremovable Subarrays II
Hard
Rotate Image
Medium
Minimum Length of String After Operations
Medium
Minimum Window Substring3 Months
Hard
Odd String Difference
Easy
Count Vowel Strings in Ranges
Medium
Activity Participants
Medium
Make Lexicographically Smallest Array by Swapping Elements
Medium
Minimum Operations to Make Columns Strictly Increasing
Easy
Minimum String Length After Removing Substrings
Easy
Valid Palindrome II3 Months
Easy
Remove All Occurrences of a Substring
Medium
Middle of the Linked List
Easy
Course Schedule
Medium
Maximum Value at a Given Index in a Bounded Array6 Months
Medium
Two Sum3 Months
Easy
Search in Rotated Sorted Array
Medium
String Compression
Medium
Rotting Oranges
Medium
Backspace String Compare
Easy
Count Binary Substrings
Easy
Height Checker
Easy
Number of Islands
Medium
Find the Smallest Divisor Given a Threshold
Medium
Exclusive Time of Functions
Medium
Non-overlapping Intervals
Medium
Reverse Words in a String
Medium
Move Zeroes
Easy
Find the Index of the First Occurrence in a String
Easy
Heaters6 Months
Medium
Longest Common Prefix
Easy
Taking Maximum Energy From the Mystic Dungeon
Medium
Maximum Sum of Distinct Subarrays With Length K
Medium
Container With Most Water
Medium
Roman to Integer3 Months
Easy
LRU Cache
Medium
Minimum Operations to Make All Array Elements Equal
Medium
Rearrange Array to Maximize Prefix Score
Medium
Merge Sorted Array
Easy
Add Binary
Easy
Lexicographically Smallest String After Substring Operation
Medium
Longest Valid Parentheses30 Days
Hard
Contains Duplicate
Easy
Number of Divisible Triplet Sums
Medium
Maximum Subarray
Medium
Report Spam Message
Medium
Group Anagrams6 Months
Medium
Shortest and Lexicographically Smallest Beautiful String
Medium
Last Substring in Lexicographical Order
Hard
Minimum Number of Flips to Make the Binary String Alternating30 Days
Medium
Merge k Sorted Lists
Hard
3Sum6 Months
Medium
Maximum Units on a Truck
Easy
Maximum Median Sum of Subsequences of Size 33 Months
Medium
N-Queens
Hard
Median of Two Sorted Arrays
Hard
Letter Combinations of a Phone Number
Medium
Valid Anagram
Easy
Majority Element
Easy
Gas Station
Medium
Online Stock Span
Medium
Subarray Sum Equals K
Medium
Minimum Absolute Difference
Easy
Find the Duplicate Number
Medium
Max Consecutive Ones III6 Months
Medium
Integer to Roman3 Months
Medium
Palindrome Number6 Months
Easy
Rotate Array
Medium
Add Two Numbers6 Months
Medium
Word Search
Medium
Best Time to Buy and Sell Stock6 Months
Easy
Simplify Path
Medium
Minimum Cost to Connect Sticks6 Months
Medium
Count Ways to Group Overlapping Ranges
Medium
First Unique Character in a String
Easy
Count Pairs Of Similar Strings
Easy
Minimum Number of Swaps to Make the String Balanced
Medium
Remove Duplicates from Sorted Array
Easy
Intersection of Two Arrays II
Easy
Find Minimum in Rotated Sorted Array
Medium
Kth Largest Element in an Array
Medium
Max Consecutive Ones
Easy
Search Insert Position
Easy
Coin Change3 Months
Medium
Plus One
Easy
Find Occurrences of an Element in an Array3 Months
Medium
Sliding Window Maximum6 Months
Hard
Number of Substrings With Only 1s3 Months
Medium
Reorganize String
Medium
Check if Array Is Sorted and Rotated
Easy
Last Stone Weight
Easy
Longest Consecutive Sequence
Medium
Water Bottles6 Months
Easy
Merge Strings Alternately
Easy
Subsets
Medium
Missing Number
Easy
Fizz Buzz3 Months
Easy
Reverse Integer
Medium
Find Longest Calls
Medium
Optimal Partition of String6 Months
Medium
Longest Mountain in Array6 Months
Medium
Minimum Number of Moves to Make Palindrome3 Months
Hard
Candy
Hard
Sort Characters By Frequency
Medium
Flip String to Monotone Increasing
Medium
Find All Possible Stable Binary Arrays II
Hard
3Sum Smaller
Medium
Validate Binary Search Tree
Medium
Find The First Player to win K Games in a Row
Medium
Minimum Insertion Steps to Make a String Palindrome
Hard
Type of Triangle
Easy
Kth Missing Positive Number
Easy
Minimum Swaps to Group All 1's Together II
Medium
Minimum Number of Changes to Make Binary String Beautiful
Medium
Find Pivot Index
Easy
Minimum Add to Make Parentheses Valid
Medium
Single-Threaded CPU6 Months
Medium
Big Countries
Easy
Number of Operations to Make Network Connected6 Months
Medium
Minimum Number of Increments on Subarrays to Form a Target Array3 Months
Hard
Boats to Save People3 Months
Medium
Linked List Cycle
Easy
Partition Labels
Medium
Flipping an Image
Easy
Minimize XOR30 Days
Medium
Gray Code
Medium
Sum of Absolute Differences in a Sorted Array3 Months
Medium
Minimize Maximum Pair Sum in Array
Medium
Get Equal Substrings Within Budget
Medium
Reach a Number3 Months
Medium
Minimum Moves to Equal Array Elements
Medium
Removing Stars From a String
Medium
Count Number of Teams
Medium
Smallest Missing Non-negative Integer After Operations
Medium