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5 days ago 
Pravardhan Aare • 0
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Recent Replies
Answer: Cloudflare OA Question 2024 September | Bit Manipulation | on-campus by Pravardhan Aare • 0
Solution: Number of 1 Bits — Brian Kernighan's Bit Trick Approach We use Brian Kernighan's Algorithm. The key insight i…
Answer: Twilio OA Question 2024 August | Trees | on-campus by Pravardhan Aare • 0
Solution: Symmetric Tree — Recursive Mirror Check Approach A tree is symmetric if its left subtree is a mirror image of its rig…
Answer: Stripe OA Question 2024 July | Intervals & Heap | on-campus by Pravardhan Aare • 0
Solution: Meeting Rooms II — Min Heap of End Times Approach We use a Min Heap that tracks the end times of all currently ongoin…
Answer: JPMorgan OA Question 2024 June | Heap | on-campus by Pravardhan Aare • 0
Solution: Kth Largest Element — Min Heap of Size K Approach We use a Min Heap of size K. The idea is to maintain a heap that al…
Answer: American Express OA Question 2024 May | Dynamic Programming | on-campus by Pravardhan Aare • 0
Solution: Decode Ways — Space Optimized Bottom-Up DP Approach We use Dynamic Programming. Define dp[i] as the number of ways to…
Answer: Snowflake OA Question 2024 September | Two Pointers | on-campus by Pravardhan Aare • 0
Solution: Container With Most Water — Greedy Two Pointers Approach A brute force O(N²) approach tries all pairs, but we ca…
Answer: Dell OA Question 2024 August | Arrays | on-campus by Pravardhan Aare • 0
Solution: Sort Colors — Dutch National Flag Algorithm Approach We use the Dutch National Flag Algorithm by Edsger Dijkstra. We …
Answer: Citrix OA Question 2024 July | Graphs | on-campus by Pravardhan Aare • 0
Solution: Clone Graph — BFS with HashMap Approach We use BFS with a HashMap that maps each original node to its cloned copy. Th…
Answer: Mastercard OA Question 2024 June | Sliding Window | on-campus by Pravardhan Aare • 0
Solution: Longest Repeating Character Replacement — Sliding Window Approach We use a Variable-Size Sliding Window. The key insi…
Answer: Visa OA Question 2024 May | Matrix & HashSet | on-campus by Pravardhan Aare • 0
Solution: Valid Sudoku — HashSet per Row, Column, and Box Approach We make a single pass through the 9x9 board. For each filled…
Answer: Nutanix OA Question 2024 September | Trees | on-campus by Pravardhan Aare • 0
Solution: Diameter of Binary Tree — DFS Height with Global Max Approach We use a Recursive DFS. For every node, the longest pat…
Answer: Red Hat OA Question 2024 August | Backtracking | on-campus by Pravardhan Aare • 0
Solution: Combination Sum — Backtracking with Reuse Approach We use Backtracking. Since the same candidate can be reused unlimi…
Answer: VMware OA Question 2024 July | Graphs | on-campus by Pravardhan Aare • 0
Solution: Course Schedule — Topological Sort (Kahn's BFS) Approach This problem reduces to cycle detection in a directed gr…
Answer: Deloitte OA Question 2024 June | Strings & DP | on-campus by Pravardhan Aare • 0
Solution: Palindromic Substrings — Expand Around Center Approach We use the Expand Around Center technique. Every palindrome ha…
Answer: Capgemini OA Question 2024 May | Arrays | on-campus by Pravardhan Aare • 0
Solution: Maximum Subarray — Kadane's Algorithm Approach We use Kadane's Algorithm, a classic greedy/DP technique. The …
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