Everything

Duplicate Number

Longest Common Prefix

Parentheses matching

Longest Valid Parentheses

Valid Parenthesis String

Reorganize String

string

Maximum Subarray Sum

Best Time to Buy and Sell Stock

greedy

Best Time to Buy and Sell Stock II

greedy

Best Time to Buy and Sell Stock IV

Continuous Subarray Sum

Subarray Sum Equals K

Product of Array Except Self

Maximize Subarray Sum After Removing All Occurrences of One Element

Asteroid Collision

stack

Reverse Linked List

linked list

Remove Nth Node From End of List

Merging Two Sorted Linked Lists

Merge K Sorted Lists

Detecting a Cycle in Linked List

Implementing LRU Cache

Longest Consecutive Sequence

Longest Increasing Subsequence

Longest Common Subsequence

Longest Palindromic Subsequence

Sum of Good Subsequences

Distinct Subsequences

Longest Palindromic Substring

palindromes

Count Palindromic Substrings

palindromes

Manacher Algorithm

palindromes

Palindromic Partition

palindromes

Containers with Most Water

two pointers

Longest Substring Without Repeating Characters

two pointers sliding window

String Compression

two pointers sliding window

Take K of Each Character From Left and Right

sliding window

Partition Labels

sliding window

Tree Traversals

Binary Tree from its Traversals

Binary Tree Maximum Path Sum

Lowest Common Ancestor

In a Binary Tree

In a Binary Search Tree

Check Completeness of a Binary Tree

binary tree

Median in a Stream

heap

Shortest Path in Binary Matrix

bfs

bfs

All Nodes Distance K in Binary Tree

binary tree bfs

Reconstruct Itinerary

eulerian path dfs

Single Source Shortest Path

Dijkstra Algorithm

dijkstra sssp

Cheapest Flights Within K Stops

dijkstra sssp bfs

Bellman-Ford Algorithm

Minimum Spanning Tree

Kruskals algorithm

mst

Min Cost to Connect All Points

mst

Prims Algorithm

mst

Topological Sort

topological sort

Find Eventual Safe States

topological sort

Max Flow Min Cut

Merge Intervals

intervals

Insert Interval

intervals

Min Meeting Rooms

intervals greedy

Line Sweep Technique

line sweep

Zero Array Transformation I

line sweep

Zero Array Transformation II

line sweep binary search

Smallest Range Covering Elements from K Lists

line sweep intervals

Minimum Number of Arrows to Burst Balloons

intervals greedy

Monotonic Stack

monotonic stack

Largest Rectangle in Histogram

monotonic stack

Sum of Subarray Minimums

monotonic stack

Daily Temperatures

monotonic stack

Next Permutation

permutation

Permutation Sequence

permutation

Constructing Powersets

DSU with Rollbacks

Number of Connected Components in an Undirected Graph

dsu

The Earliest Moment When Everyone Become Friends

Making A Large Island

Binary Search in Array

Binary Search in Sorted Array

binary search

First and Last Position in a Sorted Array

binary search

Find Minimum in Rotated Sorted Array

binary search

Find Peak Element

Minimum Limit of Balls in a Bag

binary search

Split Array Largest Sum

binary search

Swim in Rising Water

binary search bfs

Greedy Approach

greedy

Max Chunks To Make Sorted

greedy

greedy

greedy

bfs

N-Queens Problem

Bounded Knapsack

Unbounded Knapsack

Fractional Knapsack

Subsetsum to knapsack

knapsack

knapsack

Range Frequency Queries

trie dynamic programming

optimisers

03a Implementing Self Attention

self attention transformers