24654번 - Build The Grid 스페셜 저지다국어

문제

Given is a square grid of $N \times N$ squares. Your task is to paint each square of the grid either white or black such that:

• The white squares are connected: for any two white squares, you can go from one to the other by moving only between white squares that share a side.
• Each black square shares a side with at least one white square.
• Denote the number of black cells in the $i$-th row as $p_i$. The sequence $P = (p_1, p_2, \ldots, p_N)$ is then a permutation of integers between 0ドル$ and $N-1,ドル inclusive.
• Denote the number of black cells in the $j$-th column as $q_j$. The sequence $Q = (q_1, q_2, \ldots, q_N)$ is then a permutation of integers between 0ドル$ and $N-1,ドル inclusive.

It can be shown that such a construction always exists.

입력

The input consists of one integer $N$ (2ドル \le N \le 500$).

출력

Print $N$ lines. On the $i$-th line, print a string of length $N$ consisting of characters 'B' and 'W'. The $j$-th character in the $i$-th string corresponds to the square in $i$-th row and $j$-th column: 'B' denotes black squares and 'W' denotes white squares.

제한

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