Rooks inside a rectangle P31389


Statement
 

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Consider a rectangular board r × c with rc. Write a program that prints all the ways to place r rooks on the board so that no rook threatens another rook.

Input

Input consists of two natural numbers r and c, with 1 ≤ rc.

Output

Print all the ways to place r rooks on the board so that no rook threatens another rook. Represent the rooks with a ‘R’, and the empty positions with a dot. Print an empty line after each board.

Information about the checker

You can print the solutions to this exercise in any order.

Public test cases
  • Input

    2 3
    

    Output

    R..
    .R.
    
    R..
    ..R
    
    .R.
    R..
    
    .R.
    ..R
    
    ..R
    R..
    
    ..R
    .R.
    
    
  • Input

    1 1
    

    Output

    R
    
    
  • Information
    Author
    Salvador Roura
    Language
    English
    Translator
    Salvador Roura
    Original language
    Catalan
    Other languages
    Catalan
    Official solutions
    C++
    User solutions
    C++