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

A. Fox And Snake

题目连接：

http://codeforces.com/contest/510/problem/A

Description

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 Input

3 3

Sample Output

..#

Hint

题意

让你画出n*m的弯道，一直转弯的那种

题解：

水题，模拟一下就好了

代码

#include<bits/stdc++.h>
using namespace std;

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