Скачать или смотреть CodeChef Starters 179 | Problem 4- Can you Reach??? |

🚀 Welcome to Code Answers! In this video, I solve the Can You Reach? problem from the latest CodeChef contest with an optimized approach.

🏔 Problem Overview:
A mountain range consists of N peaks with specific height properties. Each person at a peak can only move to an adjacent peak, but they cannot revisit a height they have already passed through.

Goal: Find the total number of friendships, where two people can reach a common mountain.

💡 Topics Covered:
✅ Graph Traversal (DFS/BFS) for Connected Components
✅ Union-Find (Disjoint Set Union) for Efficient Grouping
✅ Handling Large Constraints Efficiently

📌 Why This Solution?

We model the problem as a graph traversal problem, efficiently counting the number of connected groups.

We utilize disjoint set union (DSU) or DFS to determine friendships.

The solution is optimized to handle large constraints (N ≤ 2 × 10⁵).

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