Solution: N-Queens
Explore the backtracking solution for the N-Queens puzzle, where you learn to place n queens on an n × n board so no two attack each other. Understand how to leverage helper arrays to track columns and diagonals, and how recursion and backtracking systematically find all valid arrangements.
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Statement
The N-Queens puzzle is a classic problem in which the goal is to place n queens on an n n chessboard so that no two queens can attack each other.
In chess, a queen can move any number of squares horizontally, vertically, or diagonally. Therefore, no two queens can be placed in the same row, column, or diagonal.
Given an integer n, return all distinct valid arrangements of n queens on the board. Each arrangement should be represented as a list of strings, where each string corresponds to a row of the board. Within each string, 'Q' denotes a queen and '.' denotes an empty square.
Note: You can return the solutions in any order.
Constraints:
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