Array ( [0] => [1] => questions [2] => Basic [3] => Alpha-Triangle ) Patterns | Alpha Triangle | THE INQUISITIVE






Alpha Triangle

LEVEL:Beginner

Description

Print the pattern as shown below for all test cases.

Input Format

First line contains the value N.

Output Format

Print the output as shown in below examples.


Example 1:

Input
3
Output
*         *
* *     * *
* * * * * *
* *     * *
*         *
Example 2:

Input
4
Output
*             *
* *         * *
* * *     * * *
* * * * * * * *
* * *     * * *
* *         * *
*             *
Example 3:

Input
5
Output
*                 *
* *             * *
* * *         * * *
* * * *     * * * *
* * * * * * * * * *
* * * *     * * * *
* * *         * * *
* *             * *
*                 *

oops

Login to see Discussion




Approach


This problem can be solved into two sub problems
one part prints the upper part and other prints the lower part

Step-i)assign 1 to i
Step-ii)assign 1 to j
Step-iii) if j is less than or equal to i or j is greater than equal to 2*N-i+1 print * and space (" ")
Step-iv)else print only two spaces (" ")
Step-v)increment j by one value
Step-vi)repeat steps iii to v till j is less than or equal to 2*N
Step-vii)go to next line in printing
Step-viii)increment i value by one
Step-ix)repeat steps iii to viii till i is less than or equal to N(By now we have printed upper part of the pattern)
Step-x)assign N to i
Step-xi)assign 1 to j
Step-xii)if j is less than or equal to i or j is greater than or equal to 2*N-i+1 print * and space (" ")
Step-xiii)else print two spaces (" ")
Step-xiv)increment j value by one
Step-xv)repeat steps xii to xiv till j is less than or equal to 2*N-i+1
Step-xvi)go to next line and decrement i value by one
Step-xvii) repeat steps from xi to xvi till is greater than or equal to 1

Time Complexity:- O(n^2)
Space Complexity: O(1)


Note :

Let us know if you can come up with a better approach, mail us at support@theinquisitive.in Your approach will be reviewed and posted with credits to you.

oops

Login to see Solution






     Recommended Questions      

Topic: Patterns

Beginner

1. Right Angle Triangle2. Reverse Hallow Triangle3. Stars with Numbers4. Stars Triangle5. Stars Rhombus6. Stars Hallow Rhombus7. Standing Star Triangle8. Numbers with Stars9. Triangle with Numbers with Stars10. Standing Triangle with Numbers, Stars11. Playing with Numbers12. Reverse Right angle Triangle13. Alpha Triangle14. Hallow Rhombus15. Right Arrow with stars16. Left Arrow with stars17. Reverse Triangle with stars18. Hallow Triangle with stars19. Triangle with stars20. Reverse Triangle with stars21. Triangle with Alphabets22. Reverse Right angle Triangle with stars23. Hallow Right angle Triangle24. Square with numbers 25. 270 degrees Triangle with stars26. 180 degrees Triangle with stars27. Right straight Triangle with stars28. Triangle with numbers 29. Triangle with Alphabets30. Right Triangle with Alphabets31. Right Triangle with Numbers32. Reverse Triangle with numbers 33. Triangle Shape34. Vertical Equilibrium Triangle35. Horizontal Equilibrium Triangle36. Consecutive Triangle37. Upper Row Sum Triangle38. Hallow Triangle