2210. Count Hills and Valleys in an Array - LeetCode [ Easy ? ] POTD - 27 July 2025

📄All the notes & code are uploaded : https://leetcode.com/problems/count-hills-and-valleys-in-an-array/solutions/7012903/brute-to-optimal-with-custom-diagrams-to-82fp
❓Question Link : https://leetcode.com/problems/count-hills-and-valleys-in-an-array/description/

🧠 Question Description
You're given an array of integers and asked to count the number of "hills" and "valleys". A hill is an element that is strictly greater than its nearest distinct neighbors, while a valley is strictly smaller than its distinct neighbors. This question challenges your ability to handle equal adjacent elements, sliding window techniques, and boundary checking efficiently. Our video breaks this down from brute force to optimal, with dry runs, edge case analysis, and custom diagrams that make the concept easy to grasp. This question is often seen in interviews and Leetcode contests, and mastering it boosts your pattern recognition skills significantly. Must-watch for those targeting FAANG-level coding interviews!

🏷️Tags / Concepts Covered
hill and valley problem, leetcode hills and valleys, count hills and valleys, brute to optimal, sliding window problems, distinct neighbors problem, leetcode array problems, array pattern questions, intuitive approach, edge case handling, optimal DSA solution, coding interview questions, striver DSA sheet, striver array problems, codestorywithmik approach, leetcode POTD, faang level questions, dry run explanation, diagram-based explanation, dsa visualization, adjacent equal skipping, problem solving strategy, problem explanation from scratch, leetcode optimization, code walkthrough, clear logic building, must do leetcode, intermediate dsa questions, coding interview prep, complete DSA series, intuitive array problem, intuitive and code, dsa tutorial, solving array problems, problem understanding with dry run, leetcode solution 2025, competitive coding techniques, core logic understanding, array traversal patterns, leetcode efficient solutions, common faang dsa problems, striver code explanation, mik code breakdown, visually explained coding, debugging strategy, structured dsa learning, data structures and algorithms, programming education content, array pattern detection, practice with leetcode, software engineering interview prep, intuitive dsa channel, optimal time complexity code, custom diagram explanation, clean code with comments, real interview-style problem, clean c++/java/python solution, must-solve leetcode array, leetcode daily challenge, c++ coding explained, java coding tutorial, python coding made easy, software developer roadmap, intuitive approach to dsa

📌 Timestamps:
00:00 General Discussion
00:43 Question Understanding + Diagrams
7:35 Brute Force + Idea + Code - O(N^2)
12:22 Optimal Code + Dry Run
22:00 Code - O(N)
26:16 End Discussion

💬 🔔 Updates / Notices
Namaste! Toh kese ho aap ?
Thanks for watching, If you love the hardwork I put into making this awesome lectures Support by Commenting, Sharing & Like + Subscribe

▶️ Playlist by me
POTD : https://youtube.com/playlist?list=PL6-oWh9Q2kK4RQ9J4cYjJln6zkGXV_0wH&si=8CmExkGnOquaFnw1
The Concept : https://www.youtube.com/playlist?list=PL6-oWh9Q2kK4a3MYjGEBeB77oD_r29D19
Codechef : https://youtube.com/playlist?list=PL6-oWh9Q2kK5Yb8uPsvNSnR6ua6im2rz8&si=mu6uDRMDMVSJdPYJ

Stay curious. Stay intuitive. 🧠✨
#intuitandcode #DSA #Coding

Видео 2210. Count Hills and Valleys in an Array - LeetCode [ Easy ? ] POTD - 27 July 2025 канала Intuit & Code