A - 1 CodeForces - 510A
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.
Examples
Input
3 3
Output
…#
Input
3 4
Output
…#
Input
5 3
Output
…#
#…
Input
9 9
Output
#########
…#
#########
#…
#########
…#
#########
#…
#########
题目大意:通过代码打出相应的图形;这次是要比较简单的蛇。
代码如下(已AC):
#include<iostream>
using namespace std;
int main()
{
int n, m;
cin >> n >> m;
for (int i = 1; i <= n; i++)
{
if (i % 2 == 1)
{
for (int j = 0; j < m; j++)
cout << "#";
cout << endl;
}//行数为单数就全输出“#”
else if((i/2)%2==0)//双数行中的双数;
{
cout << "#";
for (int j = 1; j < m; j++)
cout << ".";
cout << endl;
}
else单数行中的单数;
{
for (int j = 1; j < m; j++)
cout << ".";
cout << "#" << endl;
}
}
return 0;
}