A. Fox And Snake(Codeforces Round #290 (Div. 2))

A. Fox And Snake

time limit per test

memory limit per test

input

output

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.

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 the snake cells should be filled with number signs ('#').

Consider sample tests in order to understand the snake pattern.

Input

n and m (3 ≤ n, m ≤ 50).

n is an odd

Output

n lines. Each line should contain a string consisting of m

Sample test(s)

input

3 3

output

### ..# ###

input

3 4

output

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

input

5 3

output

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

input

9 9

output

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

#include<iostream>
#include<algorithm>
#include<stdio.h>
#include<string.h>
#include<stdlib.h>

using namespace std;

int main()
{
    int n,m;
    while(scanf("%d%d",&n,&m)!=EOF)
    {
        for(int i=1;i<=n;i++)
        {
            if(i%2 == 1)
            {
                for(int j=1;j<=m;j++)
                {
                    printf("#");
                }
                printf("\n");
            }
            else
            {
                if(i%2 == 0 && i%4 == 0)
                {
                    printf("#");
                    for(int j=2;j<=m;j++)
                    {
                        printf(".");
                    }
                    printf("\n");
                }
                else if(i%2 == 0 && i%4!=0)
                {
                    for(int j=1;j<m;j++)
                    {
                        printf(".");
                    }
                    printf("#\n");
                }
            }
        }
    }
    return 0;
}