AlgoMap.io - Free Data Structures & Algorithms Roadmap

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Easy Find Closest Number to Zero

Solution 🎥 Code

Difficulty 3/10 Status ✖

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Easy Merge Strings Alternately

Solution 🎥 Code

Difficulty 4/10 Status ✖

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Easy Roman to Integer

Solution 🎥 Code

Difficulty 4.5/10 Status ✖

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Easy Is Subsequence

Solution 🎥 Code

Difficulty 4.5/10 Status ✖

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Easy Best Time to Buy and Sell Stock

Solution 🎥 Code

Difficulty 5/10 Status ✖

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Easy Longest Common Prefix

Solution 🎥 Code

Difficulty 5/10 Status ✖

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Easy Summary Ranges

Solution 🎥 Code

Difficulty 5/10 Status ✖

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Easy Remove Duplicates From Sorted Array

Solution 🎥 Code

Difficulty 5/10 Status ✖

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Easy Remove Element

Solution 🎥 Code

Difficulty 5/10 Status ✖

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Easy Merge Sorted Array

Solution 🎥 Code

Difficulty 5/10 Status ✖

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Medium Best Time to Buy and Sell Stock II

Solution 🎥 Code

Difficulty 5.5/10 Status ✖

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Medium Remove Duplicates From Sorted Array II

Solution 🎥 Code

Difficulty 6/10 Status ✖

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Medium Sort Colors

Solution 🎥 Code

Difficulty 6.5/10 Status ✖

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Medium Product of Array Except Self

Solution 🎥 Code

Difficulty 7/10 Status ✖

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Medium H Index

Solution 🎥 Code

Difficulty 7/10 Status ✖

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Medium Merge Intervals

Solution 🎥 Code

Difficulty 8/10 Status ✖

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Medium Spiral Matrix

Solution 🎥 Code

Difficulty 8/10 Status ✖

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Medium ZigZag Conversion

Solution 🎥 Code

Difficulty 8/10 Status ✖

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Medium Rotate Image

Solution 🎥 Code

Difficulty 9/10 Status ✖

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Easy Jewels and Stones

Solution 🎥 Code

Difficulty 3/10 Status ✖

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Easy Contains Duplicate

Solution 🎥 Code

Difficulty 3/10 Status ✖

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Easy Ransom Note

Solution 🎥 Code

Difficulty 4/10 Status ✖

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Easy Valid Anagram

Solution 🎥 Code

Difficulty 5/10 Status ✖

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Easy Maximum Number of Balloons

Solution 🎥 Code

Difficulty 6/10 Status ✖

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Easy Two Sum

Solution 🎥 Code

Difficulty 6/10 Status ✖

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Medium Valid Sudoku

Solution 🎥 Code

Difficulty 6.5/10 Status ✖

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Medium Group Anagrams

Solution 🎥 Code

Difficulty 7.5/10 Status ✖

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Easy Majority Element

Solution 🎥 Code

Difficulty 8/10 Status ✖

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Hard Longest Consecutive Sequence

Solution 🎥 Code

Difficulty 8.5/10 Status ✖

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Easy Squares of a Sorted Array

Solution 🎥 Code

Difficulty 4/10 Status ✖

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Easy Reverse String

Solution 🎥 Code

Difficulty 4/10 Status ✖

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Easy Two Sum II - Input Array Is Sorted

Solution 🎥 Code

Difficulty 5/10 Status ✖

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Easy Valid Palindrome

Solution 🎥 Code

Difficulty 5/10 Status ✖

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Medium 3Sum

Solution 🎥 Code

Difficulty 7/10 Status ✖

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Medium Container With Most Water

Solution 🎥 Code

Difficulty 7.5/10 Status ✖

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Medium 3Sum Closest

Solution 🎥 Code

Difficulty 7.5/10 Status ✖

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Medium 4Sum

Solution 🎥 Code

Difficulty 7.5/10 Status ✖

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Hard Trapping Rain Water

Solution 🎥 Code

Difficulty 9/10 Status ✖

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Easy Baseball Game

Solution 🎥 Code

Difficulty 4/10 Status ✖

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Easy Valid Parentheses

Solution 🎥 Code

Difficulty 5.5/10 Status ✖

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Medium Evaluate Reverse Polish Notation (RPN)

Solution 🎥 Code

Difficulty 6/10 Status ✖

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Medium Daily Temperatures

Solution 🎥 Code

Difficulty 6.5/10 Status ✖

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Medium Min Stack

Solution 🎥 Code

Difficulty 7/10 Status ✖

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Hard Largest Rectangle in Histogram

Solution 🎥 Code

Difficulty 9.5/10 Status ✖

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Easy Remove Duplicates from Sorted List

Solution 🎥 Code

Difficulty 4/10 Status ✖

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Medium Insert Greatest Common Divisors in Linked List

Solution 🎥 Code

Difficulty 4/10 Status ✖

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Easy Reverse Linked List

Solution 🎥 Code

Difficulty 5/10 Status ✖

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Easy Merge Two Sorted Lists

Solution 🎥 Code

Difficulty 5/10 Status ✖

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Easy Linked List Cycle

Solution 🎥 Code

Difficulty 6/10 Status ✖

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Easy Middle of the Linked List

Solution 🎥 Code

Difficulty 6/10 Status ✖

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Medium Remove Nth Node from End of List

Solution 🎥 Code

Difficulty 6/10 Status ✖

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Medium Copy List with Random Pointer

Solution 🎥 Code

Difficulty 7/10 Status ✖

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Easy Binary Search

Solution 🎥 Code

Difficulty 3/10 Status ✖

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Easy Search Insert Position

Solution 🎥 Code

Difficulty 3.5/10 Status ✖

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Easy First Bad Version

Solution 🎥 Code

Difficulty 4/10 Status ✖

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Easy Valid Perfect Square

Solution 🎥 Code

Difficulty 4/10 Status ✖

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Medium Search a 2D Matrix

Solution 🎥 Code

Difficulty 5/10 Status ✖

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Medium Find Minimum in Rotated Sorted Array

Solution 🎥 Code

Difficulty 6/10 Status ✖

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Medium Search in Rotated Sorted Array

Solution 🎥 Code

Difficulty 7/10 Status ✖

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Medium Koko Eating Bananas

Solution 🎥 Code

Difficulty 7/10 Status ✖

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Easy Maximum Average Subarray I

Solution 🎥 Code

Difficulty 5/10 Status ✖

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Medium Max Consecutive Ones III

Solution 🎥 Code

Difficulty 5/10 Status ✖

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Medium Longest Substring Without Repeating Characters

Solution 🎥 Code

Difficulty 5.5/10 Status ✖

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Medium Longest Repeating Character Replacement

Solution 🎥 Code

Difficulty 6/10 Status ✖

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Medium Minimum Size Subarray Sum

Solution 🎥 Code

Difficulty 6/10 Status ✖

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Medium Permutation in String

Solution 🎥 Code

Difficulty 7/10 Status ✖

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Easy Invert Binary Tree

Solution 🎥 Code

Difficulty 3/10 Status ✖

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Easy Maximum Depth of Binary Tree

Solution 🎥 Code

Difficulty 4/10 Status ✖

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Easy Balanced Binary Tree

Solution 🎥 Code

Difficulty 5/10 Status ✖

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Easy Diameter of Binary Tree

Solution 🎥 Code

Difficulty 5/10 Status ✖

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Easy Same Binary Tree

Solution 🎥 Code

Difficulty 5/10 Status ✖

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Easy Symmetric Tree

Solution 🎥 Code

Difficulty 5/10 Status ✖

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Easy Path Sum

Solution 🎥 Code

Difficulty 5.5/10 Status ✖

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Medium Subtree of Another Tree

Solution 🎥 Code

Difficulty 5.5/10 Status ✖

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Medium Binary Tree Level Order Traversal (BFS)

Solution 🎥 Code

Difficulty 6/10 Status ✖

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Easy Average of Levels in Binary Tree

Solution 🎥 Code

Difficulty 6/10 Status ✖

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Medium Kth Smallest Element in a BST

Solution 🎥 Code

Difficulty 6.5/10 Status ✖

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Easy Minimum Absolute Difference in BST

Solution 🎥 Code

Difficulty 6.5/10 Status ✖

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Medium Validate Binary Search Tree

Solution 🎥 Code

Difficulty 6.5/10 Status ✖

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Medium Lowest Common Ancestor of a Binary Search Tree

Solution 🎥 Code

Difficulty 7/10 Status ✖

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Medium Implement Trie (Prefix Tree)

Solution 🎥 Code

Difficulty 8/10 Status ✖

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Easy Last Stone Weight

Solution 🎥 Code

Difficulty 5/10 Status ✖

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Medium Kth Largest Element in an Array

Solution 🎥 Code

Difficulty 6/10 Status ✖

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Medium Top K Frequent Elements

Solution 🎥 Code

Difficulty 6/10 Status ✖

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Medium K Closest Points to Origin

Solution 🎥 Code

Difficulty 6.5/10 Status ✖

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Hard Merge K Sorted Linked Lists

Solution 🎥 Code

Difficulty 8/10 Status ✖

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Medium Subsets

Solution 🎥 Code

Difficulty 6/10 Status ✖

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Medium Permutations

Solution 🎥 Code

Difficulty 6/10 Status ✖

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Medium Combinations

Solution 🎥 Code

Difficulty 6.5/10 Status ✖

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Medium Combination Sum

Solution 🎥 Code

Difficulty 7/10 Status ✖

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Medium Letter Combinations of a Phone Number

Solution 🎥 Code

Difficulty 7/10 Status ✖

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Medium Generate Parentheses

Solution 🎥 Code

Difficulty 8/10 Status ✖

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Medium Jump Game II

Solution 🎥 Code

Difficulty 8/10 Status ✖

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Medium Word Search

Solution 🎥 Code

Difficulty 9/10 Status ✖

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Easy Find if Path Exists in Graph

Solution 🎥 Code

Difficulty 5/10 Status ✖

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Medium Number of Islands

Solution 🎥 Code

Difficulty 7/10 Status ✖

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Medium Max Area of Island

Solution 🎥 Code

Difficulty 7/10 Status ✖

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Medium Course Schedule (Detecting Cycles in a Graph)

Solution 🎥 Code

Difficulty 7/10 Status ✖

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Medium Course Schedule II (Topological Sort)

Solution 🎥 Code

Difficulty 7/10 Status ✖

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Medium Pacific Atlantic Water Flow

Solution 🎥 Code

Difficulty 8/10 Status ✖

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Medium Clone Graph

Solution 🎥 Code

Difficulty 8/10 Status ✖

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Medium Rotting Oranges

Solution 🎥 Code

Difficulty 8/10 Status ✖

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Medium Min Cost to Connect All Points (Prim's Algorithm to Create MST)

Solution 🎥 Code

Difficulty 8.5/10 Status ✖

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Medium Network Delay Time (Dijkstra's Algorithm)

Solution 🎥 Code

Difficulty 8.5/10 Status ✖

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Easy Fibonacci Number

Solution 🎥 Code

Difficulty 5/10 Status ✖

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Easy Climbing Stairs

Solution 🎥 Code

Difficulty 5/10 Status ✖

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Easy Min Cost Climbing Stairs

Solution 🎥 Code

Difficulty 6/10 Status ✖

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Medium House Robber

Solution 🎥 Code

Difficulty 6/10 Status ✖

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Medium Unique Paths

Solution 🎥 Code

Difficulty 6/10 Status ✖

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Medium Maximum Subarray (Kadane's Algorithm)

Solution 🎥 Code

Difficulty 6.5/10 Status ✖

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Medium Jump Game

Solution 🎥 Code

Difficulty 7.5/10 Status ✖

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Medium Coin Change

Solution 🎥 Code

Difficulty 7.5/10 Status ✖

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Medium Longest Increasing Subsequence

Solution 🎥 Code

Difficulty 8/10 Status ✖

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Medium Longest Common Subsequence

Solution 🎥 Code

Difficulty 10/10 Status ✖

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Easy Base 7

Solution 🎥 Code

Difficulty 5/10 Status ✖

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Easy Single Number

Solution 🎥 Code

Difficulty 6/10 Status ✖

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Easy Number of 1 Bits

Solution 🎥 Code

Difficulty 8/10 Status ✖

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Easy Add Binary

Solution 🎥 Code

Difficulty 9/10 Status ✖