Well-structured HackerRank Software Engineer Prep Kit Problem Solutions (JavaScript and Python) Table of Contents S.No Title Difficulty 1 Count Elements Greater Than Previous Average 2 Find the Smallest Missing Positive Integer 3 Check Palindrome by Filtering Non-Letters 4 Check for Non-Identical String Rotation 5 Target Index Search 6 Find First Occurrence 7 Maximum Number of Non-Overlapping Intervals 8 Validate Properly Nested Brackets 9 Min-Tracking Stack Implementation 10 One-Pass Removal of k-th Node from End 11 Count Number Pairs 12 Remove Consecutive Duplicates from Sorted Linked List 13 Generate Valid Angle Bracket Sequences 14 Remove Elements Within K Distance 15 Two Sum 16 Check Valid Anagram 17 Lexicographical Letter Combinations of Phone Digits 18 Place N Cameras Without Conflict on Blocked Grid 19 Custom Fibonacci Sequence 20 Ways to Fill Slots with Single or Double Coverage 21 Count Connected Components in Network 22 Height of Binary Search Tree 23 Compare BSTs for Equal Values but Different Structure 24 Detect Cycle in Module Dependency Graph 25 Merge and Sort Intervals 26 Longest Arithmetic Subsequence with Given Difference 27 Pivoted Search 28 Find Peak Element in Bitonic Array 29 Max Unique Substring Length in a Session 30 Task Scheduler with Cooldown and Multiple Machines 31 Next Greater Element with Position Offset 32 Zero-Sum Triplets within Sliding Window 33 Maximize Revenue from Video Streams with Bandwidth Limit 34 Reverse Even-Indexed Nodes and Append 35 Longest Alternating Binary Substring with Limited Flips 36 Find Index Combinations with Target Weight Sum 37 Minimum Plans to Reach Target Bandwidth 38 Longest Increasing Subsequence Length 39 Top K Frequent Events with Order Preservation 40 Peak Concurrent Sessions per User Group 41 Queue from Two Stacks 42 Shortest Path with Processing Delays at Nodes 43 Min Spanning Tree with One Free Edge 44 Subarrays with Given Sum and Bounded Maximum 45 Median of Two Circularly Sorted Logs 46 Maximize Profit with Task Deadlines and Multiple Servers 47 Max Area Under Histogram After Removing One Bar 48 Smallest Substring Containing All Patterns 49 Minimize Task Cancellations to Avoid Server Overlaps 50 Counting Stable Performance Intervals 51 Solve Diagonal Sudoku with 3x3 Blocks 52 Min Cost to Convert String Arrays with Edit Distance 53 Priority-Aware LRU Cache MIT License Copyright (c) 2025 Anuj Singh
