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💻SWE Sheet
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💻 Playlist

Top SWE Sheet Interview Questions

Pattern-based coding interview preparation

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Easy0/0
Medium0/0
Hard0/0
Two Sum
Easy
PracticeVideo
Contains Duplicate
Easy
PracticeVideo
Majority Element
Easy
PracticeVideo
Majority Element II
Medium
PracticeVideo
Missing Number
Easy
PracticeVideo
Find the Duplicate Number
Medium
PracticeVideo
Sort Colors
Medium
PracticeVideo
Best Time to Buy and Sell Stock
Easy
PracticeVideo
Maximum Subarray
Medium
PracticeVideo
Maximum Product Subarray
Medium
PracticeVideo
Maximum Sum Circular Subarray
Medium
PracticeVideo
Next Permutation
Medium
PracticeVideo
Rearrange Array Elements by Sign
Medium
PracticeVideo
Leaders in an Array
Easy
PracticeVideo
Product of Array Except Self
Medium
PracticeVideo
Kth Largest Element in an Array (Quickselect)
Medium
PracticeVideo
Subarray Sum Equals K
Medium
PracticeVideo
Continuous Subarray Sum
Medium
PracticeVideo
Longest Subarray With Sum 0
Medium
PracticeVideo
Count Subarrays With XOR K
Medium
PracticeVideo
Subarray Sums Divisible by K
Medium
PracticeVideo
Longest Consecutive Sequence
Medium
PracticeVideo
Two Sum II - Input Array Is Sorted
Medium
PracticeVideo
Valid Palindrome
Easy
PracticeVideo
Remove Duplicates From Sorted Array
Easy
PracticeVideo
Move Zeroes
Easy
PracticeVideo
Container With Most Water
Medium
PracticeVideo
3Sum
Medium
PracticeVideo
4Sum
Medium
PracticeVideo
Trapping Rain Water
Hard
PracticeVideo
Boats to Save People
Medium
PracticeVideo
Partition Labels
Medium
PracticeVideo
Backspace String Compare
Easy
PracticeVideo
Maximum Average Subarray I
Easy
PracticeVideo
Maximum Sum Subarray of Size K
Easy
PracticeVideo
First Negative Number in Every Window
Easy
PracticeVideo
Permutation in String
Medium
PracticeVideo
Find All Anagrams in a String
Medium
PracticeVideo
Longest Substring Without Repeating Characters
Medium
PracticeVideo
Longest Repeating Character Replacement
Medium
PracticeVideo
Minimum Size Subarray Sum
Medium
PracticeVideo
Fruit Into Baskets
Medium
PracticeVideo
Max Consecutive Ones III
Medium
PracticeVideo
Minimum Window Substring
Hard
PracticeVideo
Longest Subarray With At Most K Distinct
Hard
PracticeVideo
Sliding Window Median
Hard
PracticeVideo
Sliding Window Maximum
Hard
PracticeVideo
Binary Search
Easy
PracticeVideo
Search Insert Position
Easy
PracticeVideo
Lower Bound & Upper Bound
Easy
PracticeVideo
Find First and Last Position of Element in Sorted Array
Medium
PracticeVideo
Search in Rotated Sorted Array
Medium
PracticeVideo
Search in Rotated Sorted Array II
Medium
PracticeVideo
Find Minimum in Rotated Sorted Array
Medium
PracticeVideo
Single Element in a Sorted Array
Medium
PracticeVideo
Find Peak Element
Medium
PracticeVideo
Koko Eating Bananas
Medium
PracticeVideo
Capacity To Ship Packages Within D Days
Medium
PracticeVideo
Split Array Largest Sum
Hard
PracticeVideo
Minimum Number of Days to Make m Bouquets
Medium
PracticeVideo
Allocate Minimum Number of Pages
Hard
PracticeVideo
Aggressive Cows
Medium
PracticeVideo
Painter's Partition
Hard
PracticeVideo
Nth Root of an Integer
Medium
PracticeVideo
Search a 2D Matrix
Medium
PracticeVideo
Search a 2D Matrix II
Medium
PracticeVideo
Matrix Median
Hard
PracticeVideo
Kth Smallest Element in a Sorted Matrix
Medium
PracticeVideo
Median of Two Sorted Arrays
Hard
PracticeVideo
Kth Element of Two Sorted Arrays
Hard
PracticeVideo
Merge Intervals
Medium
PracticeVideo
Insert Interval
Medium
PracticeVideo
Non-overlapping Intervals
Medium
PracticeVideo
Meeting Rooms
Easy
PracticeVideo
Meeting Rooms II
Medium
PracticeVideo
Minimum Number of Platforms
Medium
PracticeVideo
Minimum Number of Arrows to Burst Balloons
Medium
PracticeVideo
The Skyline Problem
Hard
PracticeVideo
Reverse Words in a String
Medium
PracticeVideo
Longest Common Prefix
Easy
PracticeVideo
Valid Anagram
Easy
PracticeVideo
Roman to Integer
Easy
PracticeVideo
Integer to Roman
Medium
PracticeVideo
String to Integer (atoi)
Medium
PracticeVideo
Compare Version Numbers
Medium
PracticeVideo
Count and Say
Medium
PracticeVideo
Implement strStr()
Easy
PracticeVideo
KMP Algorithm / Prefix Function
Medium
PracticeVideo
Z Algorithm
Medium
PracticeVideo
Rabin-Karp Algorithm
Medium
PracticeVideo
Reverse Linked List
Easy
PracticeVideo
Middle of the Linked List
Easy
PracticeVideo
Remove Nth Node From End of List
Medium
PracticeVideo
Delete Node in a Linked List
Medium
PracticeVideo
Add Two Numbers
Medium
PracticeVideo
Remove Duplicates From Sorted List
Easy
PracticeVideo
Rotate List
Medium
PracticeVideo
Linked List Cycle
Easy
PracticeVideo
Linked List Cycle II
Medium
PracticeVideo
Palindrome Linked List
Easy
PracticeVideo
Reverse Linked List II
Medium
PracticeVideo
Reverse Nodes in K-Group
Hard
PracticeVideo
Reorder List
Medium
PracticeVideo
Merge Two Sorted Lists
Easy
PracticeVideo
Merge K Sorted Lists
Hard
PracticeVideo
Sort List
Medium
PracticeVideo
Intersection of Two Linked Lists
Easy
PracticeVideo
Copy List With Random Pointer
Medium
PracticeVideo
Flatten a Linked List
Hard
PracticeVideo
Reverse Doubly Linked List
Easy
PracticeVideo
Flatten Multilevel Doubly Linked List
Medium
PracticeVideo
Next Greater Element I
Easy
PracticeVideo
Next Greater Element II
Medium
PracticeVideo
Next Smaller Element
Medium
PracticeVideo
Previous Greater Element
Medium
PracticeVideo
Previous Smaller Element
Medium
PracticeVideo
Stock Span Problem
Medium
PracticeVideo
Largest Rectangle in Histogram
Hard
PracticeVideo
Maximal Rectangle
Hard
PracticeVideo
Sum of Subarray Minimums
Medium
PracticeVideo
Maximum of Minimums of Every Window
Hard
PracticeVideo
Valid Parentheses
Easy
PracticeVideo
Evaluate Reverse Polish Notation
Medium
PracticeVideo
Basic Calculator
Hard
PracticeVideo
Basic Calculator II
Medium
PracticeVideo
Infix to Postfix
Medium
PracticeVideo
Prefix to Infix Conversion
Medium
PracticeVideo
Postfix to Prefix Conversion
Medium
PracticeVideo
Sort a Stack Recursively
Medium
PracticeVideo
Reverse a Stack Recursively
Medium
PracticeVideo
Subsets
Medium
PracticeVideo
Subsets II
Medium
PracticeVideo
Subset Sums
Medium
PracticeVideo
Subsequences With Given Sum
Medium
PracticeVideo
Combination Sum
Medium
PracticeVideo
Combination Sum II
Medium
PracticeVideo
Combination Sum III
Medium
PracticeVideo
Letter Combinations of a Phone Number
Medium
PracticeVideo
Permutations
Medium
PracticeVideo
Permutations II
Medium
PracticeVideo
K-th Permutation Sequence
Hard
PracticeVideo
N-Queens
Hard
PracticeVideo
Sudoku Solver
Hard
PracticeVideo
Rat in a Maze
Medium
PracticeVideo
M-Coloring Problem
Medium
PracticeVideo
Word Search
Medium
PracticeVideo
Word Search II
Hard
PracticeVideo
N Meetings in One Room / Activity Selection
Easy
PracticeVideo
Job Sequencing Problem
Medium
PracticeVideo
Jump Game
Medium
PracticeVideo
Jump Game II
Medium
PracticeVideo
Gas Station
Medium
PracticeVideo
Candy
Hard
PracticeVideo
Assign Cookies
Easy
PracticeVideo
Lemonade Change
Easy
PracticeVideo
Fractional Knapsack
Medium
PracticeVideo
Connect N Ropes With Minimum Cost
Medium
PracticeVideo
Huffman Coding
Medium
PracticeVideo
Kth Smallest Element in an Array
Medium
PracticeVideo
Top K Frequent Elements
Medium
PracticeVideo
Top K Frequent Words
Medium
PracticeVideo
K Closest Points to Origin
Medium
PracticeVideo
Kth Largest Element in a Stream
Easy
PracticeVideo
Merge K Sorted Arrays
Hard
PracticeVideo
Smallest Range Covering Elements From K Lists
Hard
PracticeVideo
Task Scheduler
Medium
PracticeVideo
Reorganize String
Medium
PracticeVideo
IPO
Hard
PracticeVideo
Find Median From Data Stream
Hard
PracticeVideo
Binary Tree Inorder Traversal
Easy
PracticeVideo
Binary Tree Preorder Traversal
Easy
PracticeVideo
Binary Tree Postorder Traversal
Easy
PracticeVideo
Binary Tree Level Order Traversal
Medium
PracticeVideo
Binary Tree Zigzag Level Order Traversal
Medium
PracticeVideo
Vertical Order Traversal of a Binary Tree
Hard
PracticeVideo
Boundary Traversal of Binary Tree
Medium
PracticeVideo
Top View of Binary Tree
Medium
PracticeVideo
Bottom View of Binary Tree
Medium
PracticeVideo
Left View of Binary Tree
Easy
PracticeVideo
Right Side View of Binary Tree
Medium
PracticeVideo
All Traversals in One Pass
Medium
PracticeVideo
Maximum Depth of Binary Tree
Easy
PracticeVideo
Diameter of Binary Tree
Easy
PracticeVideo
Balanced Binary Tree
Easy
PracticeVideo
Binary Tree Maximum Path Sum
Hard
PracticeVideo
Symmetric Tree
Easy
PracticeVideo
Same Tree
Easy
PracticeVideo
Maximum Width of Binary Tree
Medium
PracticeVideo
Children Sum Property
Medium
PracticeVideo
Binary Tree Paths
Easy
PracticeVideo
Path Sum II
Medium
PracticeVideo
Count Paths With Given Sum
Medium
PracticeVideo
Construct Binary Tree From Preorder and Inorder Traversal
Medium
PracticeVideo
Construct Binary Tree From Postorder and Inorder Traversal
Medium
PracticeVideo
Serialize and Deserialize Binary Tree
Hard
PracticeVideo
Flatten Binary Tree to Linked List
Medium
PracticeVideo
Lowest Common Ancestor of a Binary Tree
Medium
PracticeVideo
Distance Between Two Nodes
Medium
PracticeVideo
Search in a Binary Search Tree
Easy
PracticeVideo
Insert Into a Binary Search Tree
Medium
PracticeVideo
Delete Node in a BST
Medium
PracticeVideo
Validate Binary Search Tree
Medium
PracticeVideo
Construct BST From Preorder Traversal
Medium
PracticeVideo
Floor & Ceil in BST
Medium
PracticeVideo
Kth Smallest Element in a BST
Medium
PracticeVideo
Kth Largest Element in BST
Medium
PracticeVideo
BST Iterator
Medium
PracticeVideo
Inorder Successor in BST
Medium
PracticeVideo
Inorder Predecessor in BST
Medium
PracticeVideo
Lowest Common Ancestor of a Binary Search Tree
Medium
PracticeVideo
Two Sum IV - Input Is a BST
Easy
PracticeVideo
Recover Binary Search Tree
Medium
PracticeVideo
Largest BST in Binary Tree
Hard
PracticeVideo
Convert Sorted Array to Binary Search Tree
Easy
PracticeVideo
BFS of Graph
Easy
PracticeVideo
DFS of Graph
Easy
PracticeVideo
Number of Provinces
Medium
PracticeVideo
Number of Islands
Medium
PracticeVideo
Flood Fill
Easy
PracticeVideo
Clone Graph
Medium
PracticeVideo
Connected Components in Undirected Graph
Medium
PracticeVideo
Cycle in Undirected Graph
Medium
PracticeVideo
Cycle in Directed Graph
Medium
PracticeVideo
Topological Sort
Medium
PracticeVideo
Course Schedule
Medium
PracticeVideo
Course Schedule II
Medium
PracticeVideo
Alien Dictionary
Medium
PracticeVideo
Eventual Safe States
Medium
PracticeVideo
Shortest Path in Unweighted Graph
Medium
PracticeVideo
Word Ladder
Hard
PracticeVideo
01 Matrix
Medium
PracticeVideo
Minimum Genetic Mutation
Medium
PracticeVideo
Dijkstra's Algorithm
Medium
PracticeVideo
Network Delay Time
Medium
PracticeVideo
Path With Minimum Effort
Medium
PracticeVideo
Cheapest Flights Within K Stops
Medium
PracticeVideo
Number of Ways to Arrive at Destination
Medium
PracticeVideo
Bellman-Ford Algorithm
Medium
PracticeVideo
Floyd-Warshall Algorithm
Medium
PracticeVideo
0-1 BFS / Deque BFS
Hard
PracticeVideo
Disjoint Set Union (DSU)
Medium
PracticeVideo
Prim's Algorithm
Medium
PracticeVideo
Kruskal's Algorithm
Medium
PracticeVideo
Min Cost to Connect All Points
Medium
PracticeVideo
Accounts Merge
Medium
PracticeVideo
Number of Operations to Make Network Connected
Medium
PracticeVideo
Most Stones Removed With Same Row or Column
Medium
PracticeVideo
Kosaraju's Algorithm
Medium
PracticeVideo
Tarjan's Algorithm
Hard
PracticeVideo
Bridges in Graph
Hard
PracticeVideo
Reconstruct Itinerary
Hard
PracticeVideo
Climbing Stairs
Easy
PracticeVideo
Frog Jump
Hard
PracticeVideo
House Robber
Medium
PracticeVideo
House Robber II
Medium
PracticeVideo
Word Break
Medium
PracticeVideo
Unique Paths
Medium
PracticeVideo
Unique Paths II
Medium
PracticeVideo
Minimum Path Sum
Medium
PracticeVideo
Triangle
Medium
PracticeVideo
Cherry Pickup
Hard
PracticeVideo
Dungeon Game
Hard
PracticeVideo
0/1 Knapsack Problem
Medium
PracticeVideo
Unbounded Knapsack
Medium
PracticeVideo
Subset Sum Problem
Medium
PracticeVideo
Partition Equal Subset Sum
Medium
PracticeVideo
Count Subsets With Given Sum
Medium
PracticeVideo
Target Sum
Medium
PracticeVideo
Coin Change
Medium
PracticeVideo
Coin Change II
Medium
PracticeVideo
Rod Cutting
Medium
PracticeVideo
Longest Increasing Subsequence
Medium
PracticeVideo
Number of Longest Increasing Subsequence
Medium
PracticeVideo
Longest Divisible Subset
Medium
PracticeVideo
Longest String Chain
Medium
PracticeVideo
Longest Common Subsequence
Medium
PracticeVideo
Longest Common Substring
Medium
PracticeVideo
Shortest Common Supersequence
Hard
PracticeVideo
Minimum Insertions/Deletions for Palindrome
Medium
PracticeVideo
Distinct Subsequences
Hard
PracticeVideo
Edit Distance
Medium
PracticeVideo
Wildcard Matching
Hard
PracticeVideo
Regular Expression Matching
Hard
PracticeVideo
Longest Palindromic Subsequence
Medium
PracticeVideo
Palindrome Partitioning II
Hard
PracticeVideo
Interleaving String
Medium
PracticeVideo
Matrix Chain Multiplication
Hard
PracticeVideo
Burst Balloons
Hard
PracticeVideo
Minimum Cost to Cut a Stick
Hard
PracticeVideo
Boolean Parenthesization
Hard
PracticeVideo
Egg Dropping Problem
Hard
PracticeVideo
Best Time to Buy and Sell Stock II
Medium
PracticeVideo
Best Time to Buy and Sell Stock III
Hard
PracticeVideo
Best Time to Buy and Sell Stock IV
Hard
PracticeVideo
Best Time to Buy and Sell Stock With Cooldown
Medium
PracticeVideo
Best Time to Buy and Sell Stock With Transaction Fee
Medium
PracticeVideo
Implement Trie (Prefix Tree)
Medium
PracticeVideo
Implement Trie II
Medium
PracticeVideo
Longest Word With All Prefixes
Medium
PracticeVideo
Replace Words
Medium
PracticeVideo
Number of Distinct Substrings
Medium
PracticeVideo
Maximum XOR of Two Numbers in an Array
Medium
PracticeVideo
Maximum XOR With an Element From Array
Hard
PracticeVideo
Range Sum Query - Mutable
Medium
PracticeVideo
Count of Smaller Numbers After Self
Hard
PracticeVideo
Power of Two
Easy
PracticeVideo
Set, Clear & Toggle Bit
Easy
PracticeVideo
Count Set Bits (Kernighan's Algorithm)
Easy
PracticeVideo
Counting Bits
Easy
PracticeVideo
XOR From L to R
Medium
PracticeVideo
Single Number I
Easy
PracticeVideo
Single Number II
Medium
PracticeVideo
Two Non-Repeating Numbers (Single Number III)
Medium
PracticeVideo
Power Set
Medium
PracticeVideo
Implement Stack Using Arrays
Easy
PracticeVideo
Implement Queue Using Arrays
Easy
PracticeVideo
Implement Stack Using Queues
Easy
PracticeVideo
Implement Queue Using Stacks
Easy
PracticeVideo
Design Min Stack
Medium
PracticeVideo
Design Circular Queue
Medium
PracticeVideo
Design Circular Deque
Medium
PracticeVideo
Implement Min Heap
Medium
PracticeVideo
Implement Max Heap
Easy
PracticeVideo
LRU Cache
Medium
PracticeVideo
LFU Cache
Hard
PracticeVideo
Insert Delete GetRandom O(1)
Medium
PracticeVideo
Time Based Key-Value Store
Medium
PracticeVideo
Design Frequency Stack
Hard
PracticeVideo