N-Queens - Coddicted

N-Queens

Title: N-Queens Source: leetcode.com

The n-queens puzzle is the problem of placing n queens on an n×n chessboard such that no two queens attack each other.

image source: leetcode.com

Given an integer n, return all distinct solutions to the n-queens puzzle.

Each solution contains a distinct board configuration of the n-queens’ placement, where 'Q' and '.' both indicate a queen and an empty space respectively.

For example,
There exist two distinct solutions to the 4-queens puzzle:

Java solution


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