Octagram Labs
JavaScript
Data Structures
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Data Structures in JS
Arrays & Two-Pointers
Two Sum (Sorted Array)
easy
Container With Most Water
medium
Hash Maps / Sets
Frequency Counter
easy
Two Sum (Unsorted)
medium
First Non-Repeating Character
medium
Stacks
Valid Parentheses
easy
Evaluate Reverse Polish Notation
medium
Linked Lists
Linked List: Array to List
easy
Reverse a Linked List
medium
Remove Nth Node From End
medium
Graphs (BFS/DFS)
Number of Islands
medium
Breadth-First Traversal Order
easy
Depth-First Traversal Order
easy
Count Connected Components
medium
Has Path
easy
Course Schedule
medium
Flood Fill
easy
Sorting
Bubble Sort
easy
Merge Sort
medium
Quicksort
medium
Sort Colors
medium
Merge Intervals
medium
Kth Largest Element
medium
Searching
Binary Search
easy
Search Insert Position
easy
First and Last Position
medium
Search in Rotated Sorted Array
medium
Integer Square Root
easy
Find Minimum in Rotated Sorted Array
medium
Sliding Window
Maximum Sum Subarray of Size K
easy
Longest Substring Without Repeating Characters
medium
Minimum Size Subarray Sum
medium
Longest Substring with At Most K Distinct
medium
Max Consecutive Ones III
medium
Count Anagram Occurrences
medium
Dynamic Programming
Fibonacci Number
easy
Climbing Stairs
easy
Coin Change
medium
House Robber
medium
Longest Increasing Subsequence
medium
0/1 Knapsack
medium
Longest Common Subsequence
medium
Edit Distance
hard
Unique Paths
medium
Maximum Product Subarray
medium
Recursion & Backtracking
Factorial
easy
Power Function
easy
Generate Subsets
medium
Generate Permutations
medium
Combinations
medium
Generate Parentheses
medium
Greedy
Best Time to Buy and Sell Stock
easy
Jump Game
medium
Gas Station
medium
Assign Cookies
easy
Non-overlapping Intervals
medium
Bit Manipulation
Number of 1 Bits
easy
Single Number
easy
Missing Number
easy
Power of Two
easy