SPOJ.com - Problem CPTTRN3

CPTTRN3 - Character Patterns (Act 3)

Using two characters: . (dot) and * (asterisk) print a grid-like pattern.

Input

You are given t - the number of test cases and for each of the test cases two positive integers: l - the number of lines and c - the number of columns in the grid. Each square of the grid is of the same size and filled with 4 dots (see the example below).

Output

For each of the test cases output the requested pattern (please have a look at the example). Use one line break in between successive patterns.

Example

Input:
3
3 1
4 4
2 5

Output:
****
*..*
*..*
****
*..*
*..*
****
*..*
*..*
****

*************
*..*..*..*..*
*..*..*..*..*
*************
*..*..*..*..*
*..*..*..*..*
*************
*..*..*..*..*
*..*..*..*..*
*************
*..*..*..*..*
*..*..*..*..*
*************

****************
*..*..*..*..*..*
*..*..*..*..*..*
****************
*..*..*..*..*..*
*..*..*..*..*..*
****************

Submit solution!

Added by:	kuszi
Date:	2012-09-03
Time limit:	1s
Source limit:	50000B
Memory limit:	1536MB
Cluster:	Cube (Intel G860)
Languages:	All except: ASM64

hide comments

2017-09-01 16:17:58
That was a great one! Solved it in nearly 10 mins. I am getting confidence now!!! I solved it using the trick of pattern 2 and little modification.

2017-08-10 17:11:51
At first, I thought I got an idea(which is a very complex one), and suddenly I applied that, do you know what happens? Poooooof... I simply tried for 6 - 7 hours but every time I was wrong. After some time I take a deep look into the patterns then I realise that I have to modify just a few steps. Now with in 10 mins I finished this program... Experience.! Take a deep look inside the program before proceeding.

Hint: Always count matrix form 0, not form 1.

Last edit: 2017-08-10 17:16:43

2017-03-30 19:19:51
AC in one go..
Using switch case will help you a lot. Good Luck :D

Last edit: 2017-03-30 19:20:53

2017-01-09 12:17:42
It was tricky, but when I understood the trick the program was very brief.
Happy to do it.

2016-10-11 16:09:25
guys, i did it by adding 4 loops each displaying one row of the pattern. Is that the solution or was i (kind of) cheating? lemme know

2016-09-23 19:11:48
@ sgtfdotfcrfn thanks !!

2016-09-21 23:41:56
Code output for example input matches exactly on Ideone.com, but gives "wrong answer" when submitted. Not sure what the issue is.

2016-09-14 18:48:31
can any one help me........ I am a beginner in spoj and i am not able to solve the problem.

2016-08-16 21:52:57
It is quite easy if you observe the positions of asterisk columns mod 3. The procedure for placing rows is the same thing.

2016-07-24 15:45:06 Kunal Singh
Tricky one.... but easy finally done... :)