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Queens Combinations - 2d As 2d - Box Chooses

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1. You are given a number n, representing the size of a n * n chess board.
2. You are required to calculate and print the combinations in which n queens can be placed on the 
     n * n chess-board. 

Note -> Use the code snippet and follow the algorithm discussed in question video. The judge can't 
               force you but the intention is to teach a concept. Play in spirit of the question.
Input Format 
A number n
Output Format 
Check the sample output and question video
Question Video
Constraints 
1 <= n <= 5
Sample Input 
2
Sample Output 
qq
--

q-
q-

q-
-q

-q
q-

-q
-q

--
qq



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