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Sig Master DSA Sheet

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

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Design Authentication Manager
Meeting Rooms II
Inorder Successor in BST
Spiral Matrix
Valid Parentheses
Min Stack
Find the Length of the Longest Common Prefix
Rotating the Box
Maximum Subarray Sum with One Deletion
Trapping Rain Water
Block Placement Queries
Power of Four
Maximum Sum Circular Subarray
Search Suggestions System
Longest String Chain
Longest Substring Without Repeating Characters
Copy List with Random Pointer
Product of Array Except Self
Merge Intervals
Number of Black Blocks
Longest Repeating Character Replacement
Random Pick with Weight
Task Scheduler
Rotate Image3 Months
Wildcard Matching
Game of Life
House Robber III
Parallel Courses III
Insert Delete GetRandom O(1)
Minimum Space Wasted From Packaging
Logger Rate Limiter
Minimum Absolute Difference Between Elements With Constraint3 Months
Move Zeroes
Excel Sheet Column Number
Shortest Bridge
Rotting Oranges
Word Ladder
Search in Rotated Sorted Array
Word Search II
LRU Cache
Number of Islands
Find All Possible Recipes from Given Supplies
Implement Trie (Prefix Tree)
Multiply Strings
Best Time to Buy and Sell Stock II
Group Anagrams
Palindrome Permutation
Design Add and Search Words Data Structure
Reverse Nodes in k-Group
Max Consecutive Ones III
Integer to Roman
Top K Frequent Elements
Merge k Sorted Lists
Merge Two Sorted Lists
Best Time to Buy and Sell Stock
House Robber II
Text Justification6 Months
Find Median from Data Stream
Number of Provinces
Restore the Array From Adjacent Pairs6 Months
Next Greater Element II
Number of Atoms
Intersection of Two Arrays
Binary Tree Zigzag Level Order Traversal
Design Memory Allocator
Count Good Nodes in Binary Tree
Minimum Cost to Make at Least One Valid Path in a Grid
Robot Room Cleaner
Boats to Save People
Find Maximum Area of a Triangle
Spiral Matrix IV