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 TriangleHallow Rhombus
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.
3
*
* * *
* * * * *
* * *
*4
*
* * *
* * *
* * * * * * *
* * *
* * *
*5
*
* * *
* * *
* * *
* * * * * * * * *
* * *
* * *
* * *
*
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Approach
Note: This problem can be solved by dividing into two parts
one part prints the upper half pattern and other part prints the lower half pattern
Step-i)initialize i to 0
Step-ii) initialize space to 1
Step-iii) print two spaces (" ")
Step-iv)increment space by one value
Step-v)repeat steps iii to iv till space is less than or equal to N-i-1
Step-vi)assign 0 to j
Step-vii)if i equal to j or i equal to N-1 or j equal to 0 or j equal to 2*i print * and space (" ")
Step-viii)else print two space (" ")
Step-ix) increment j by one value
Step-x) repeat steps vii to ix till j is less than 2*i+1
Step-xi)go to new line and increment i by one value
Step-xii)repeat ii to ix till i is less than N(Now we are done with upper part)
Step-xiii)initialize i to N-2
Step-xiv) initialize space to 1
Step-xv) print two spaces (" ")
Step-xvi)increment space by one value
Step-xvii)repeat steps xv to xvi till space is less than or equal to N-i-1
Step-xviii)assign 0 to j
Step-xix)if i equal to j or i equal to N-1 or j equal to 0 or j equal to 2*i print * and space (" ")
Step-xx)else print two space (" ")
Step-xxi) increment j by one value
Step-xxii) repeat steps xix to xxi till j is less than 2*i+1
Step-xxiii)go to new line and decrement i by one value
Step-xxiv)repeat xiv to xxiii till i is greater than 0
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.
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