N Queens | Backtracking (opens in new tab)

leetcode.com Problem Statement Place N queens on an N x N chessboard such that: No two queens attack each other. Queens cannot share: Row Column Diagonal Return all possible valid board configurations. Brute Force Intuition Try placing queens in every possible cell. After placing all queens, check whether the board is valid. Most configurations are invalid, making brute force extremely expensive. Complexity Time Complexity: O(N^N) Space Complexity: O(N²) Moving Towards the Optimal Approach In...