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Elevo
Practice Arena

Coding Challenges

Master your programming skills with our curated collection of technical interview problems.

60
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No. 226
Invert Binary Tree Easy
Topics:
Recursion Trees
Companies:
Amazon Google
Acceptance: 0%
Solve Challenge
No. 230
Kth Smallest Element in a BST Medium
Topics:
Binary Search Trees
Companies:
Amazon Google
Acceptance: 0%
Solve Challenge
No. 234
Palindrome Linked List Easy
Topics:
Linked List Recursion Two Pointers
Companies:
Amazon Google
Acceptance: 0%
Solve Challenge
No. 242
Valid Anagram Easy
Topics:
Hash Table Sorting Strings
Companies:
Amazon Bloomberg
Acceptance: 0%
Solve Challenge
No. 287
Find the Duplicate Number Medium
Topics:
Arrays Binary Search Two Pointers
Companies:
Amazon Google
Acceptance: 0%
Solve Challenge
No. 295
Find Median from Data Stream Hard
Topics:
Heap Sorting
Companies:
Amazon Google
Acceptance: 0%
Solve Challenge
No. 297
Serialize and Deserialize Binary Tree Hard
Topics:
Strings Trees
Companies:
Amazon Google
Acceptance: 0%
Solve Challenge
No. 300
Longest Increasing Subsequence Medium
Topics:
Arrays Binary Search Dynamic Programming
Companies:
Amazon Google
Acceptance: 0%
Solve Challenge
No. 322
Coin Change Medium
Topics:
Arrays Dynamic Programming
Companies:
Amazon Bloomberg
Acceptance: 0%
Solve Challenge
No. 338
Counting Bits Easy
Topics:
Bit Manipulation Dynamic Programming
Companies:
Amazon Google
Acceptance: 0%
Solve Challenge
No. 347
Top K Frequent Elements Medium
Topics:
Arrays Hash Table Heap
Companies:
Amazon Google
Acceptance: 0%
Solve Challenge
No. 371
Sum of Two Integers Medium
Topics:
Bit Manipulation Math
Companies:
Amazon Google
Acceptance: 0%
Solve Challenge
No. 394
Decode String Medium
Topics:
Recursion Stack Strings
Companies:
Amazon Bloomberg
Acceptance: 0%
Solve Challenge
No. 416
Partition Equal Subset Sum Medium
Topics:
Arrays Dynamic Programming
Companies:
Amazon Google
Acceptance: 0%
Solve Challenge
No. 438
Find All Anagrams in a String Medium
Topics:
Hash Table Sliding Window Strings
Companies:
Amazon Google
Acceptance: 0%
Solve Challenge
No. 543
Diameter of Binary Tree Easy
Topics:
Recursion Trees
Companies:
Amazon Google
Acceptance: 0%
Solve Challenge
No. 560
Subarray Sum Equals K Medium
Topics:
Arrays Hash Table
Companies:
Amazon Google
Acceptance: 0%
Solve Challenge
No. 572
Minimum Path Sum Medium
Topics:
Arrays Dynamic Programming Matrix
Companies:
Amazon Goldman Sachs
Acceptance: 0%
Solve Challenge
No. 617
Merge Two Binary Trees Easy
Topics:
Recursion Trees
Companies:
Amazon Google
Acceptance: 0%
Solve Challenge
No. 739
Daily Temperatures Medium
Topics:
Arrays Stack
Companies:
Amazon Bloomberg
Acceptance: 0%
Solve Challenge
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