99% Fail This Easy Grid Problem | LeetCode 1391 #leetcode #coding #codinginterviews #dsa

Most people think LeetCode 1391 is a simple grid traversal problem… but it’s not.

The real trick is understanding **bidirectional connections**.
If one cell connects but the other doesn’t — the path is invalid.

In this short, you’ll learn:

* Why brute force fails
* The hidden 2-way connection rule
* How BFS solves it optimally

Problem:
1391. Check if There is a Valid Path in a Grid
Difficulty: Medium
Method: BFS + Graph Traversal

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Видео 99% Fail This Easy Grid Problem | LeetCode 1391 #leetcode #coding #codinginterviews #dsa канала Leetcode Lab