题目链接：http://codeforces.com/contest/510/problem/A
A. Fox And Snake
time limit per test2 seconds
memory limit per test256 megabytes
inputstandard input
outputstandard 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.
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
The only line contains two integers: n and m (3 ≤ n, m ≤ 50).
n is an odd number.
Output
Output n lines. Each line should contain a string consisting of m characters. Do not output spaces.
Sample test(s)
input
3 3
output
###
..#
###
input
3 4
output
####
...#
####
input
5 3
output
###
..#
###
#..
###
input
9 9
output
#########
........#
#########
#........
#########
........#
#########
#........
##########include <iostream>
using namespace std;
int main()
{
int m,n;
cin>>m>>n;
for(int i=1; i<=m; i++)
{
if(i % 2 ==1)
{
for(int j=1; j<=n; j++)
cout<<"#";
cout<<endl;
}
else
{
if(i % 4 == 2)
{
for(int j=1; j<n; j++)
cout<<".";
cout<<"#"<<endl;
}
if(i % 4 == 0)
{
cout<<"#";
for(int j=1; j<n; j++)
cout<<".";
cout<<endl;
}
}
}
return 0;
}