Fox and Snakes Coding Question-Codeforces rated 1000

Problem Statement :

Fox Ciel starts to learn programming. The first task is drawing a fox! However, that turns out to be too hard for a beginner, so she decides to draw a snake instead.

A snake is a pattern on a n by m table. Denote c-th cell of r-th row as (r, c). The tail of the snake is located at (1, 1), then it’s body extends to (1, m), then goes down 2 rows to (3, m), then goes left to (3, 1) and so on.

Your task is to draw this snake for Fox Ciel: the empty cells should be represented as dot characters (‘.’) and the snake cells should be filled with number signs (‘#’).

Consider sample tests in order to understand the snake pattern.

Input Format:

The only line contains two integers: n and m (3 ≤ n, m ≤ 50).

n is an odd number.

Output Format:

Output n lines. Each line should contain a string consisting of m characters. Do not output spaces.

Given:

3 3

Output

###
..#
###

Given:

3 4

Output:

####
...#
####

Given:

5 3

Output:

###
..#
###
#..
###

Code:

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