Codeforces 510A - Fox And Snake
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.
範例:
input:
1 | 3 3 |
output:
1 | ### |
input:
1 | 3 4 |
output:
1 | #### |
input:
1 | 5 3 |
output:
1 | ### |
input:
1 | 9 9 |
output:
1 | ######### |
題意:
輸入NxM的大小，請你依照蛇行的規則畫蛇出來。
思路:
照規則畫。