Beginner
1. Arithmetic Progression2. Geometric Progression3. Harmonic Progression4. No of triangles 5. Area of Polygon6. Trailing Zeros7. Min Platforms 8. Trapping Rain 9. Jump numbers10. Segregation of 0’s and 1’s11. Two SUM12. Triplet sum 13. Diagonal Sum14. Addition of two matrixes15. Subtraction of two matrixes16. Multiplication of two matrixes17. Transpose of given array18. Spiral Matrix19. Most Frequent Element20. Majority Element 21. Max difference 22. Odd occurring23. Second Largest and Second Smallest24. Next greater number25. Count Unique Elements26. Common elements 27. Removing Duplicates28. Balanced Array29. Rotating Array by k times30. Reverse Array31. Wave Array32. Merge arrays 33. Constraint Sort34. Find element in Sorted rotated array35. Sub Array Sum36. Largest subarray of 0’s and 1’s 37. K-Sub Array38. Max subarray sum39. Contiguous Square SumArithmetic Progression
LEVEL:Beginner
Description
Given list of elements. You have to find the sum of elements which are in AP.
Input Format
First line contains a number N. Next line contains N integers separated by spaces.
Output Format
Print the resultant sum value.
5 1 2 3 4 5
15
8 0 2 4 6 8 10 12 14
56
10 1 4 7 10 13 16 19 22 25 28
145
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Approach
Approach-1:
Step-i)Traverse the array and check whether difference between adjacent elements is same or not
Step-ii) If not return "Given array is not in AP"
Step-iii)Else initialize sum variable to 0
Step-iv) Traverse the array and keep adding elements to the sum variable
Step-v) Return the sum
Time Complexity: O(n)
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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