Doubt in understanding the question

#1

Can someone please explain this question to me?
It is said that “numbers are in circular form” . How ?
How will the consecutive numbers be arranged ? and how will the sum be formed?

#2

Hi Ankush, by saying that “numbers are in circular form”, we mean that next number after last number is the first number. Consider the following example:

An array arr of size 5 as : 1, 2, -2, 3, 6

Now there are many possible ways of finding sums some of these are:

  1.   1 + 2 + -2 + 3 + 6
  2.   2 + -2 + 3 + 6
  3.   3 + 6 + 1 + 2

We are saying that one of the possible way to pick numbers for summing up is by picking up the first number (if not already considered) after the last one.
OR
You can consider the given array as repeated :

       1 2 -2 3 6 1 2 -2 3 6 (array is repeated)
  i = 0 1  2 3 4 5 6  7 8  9

now you can pick numbers from this as(i will write indices below):

0 + 1 + 2 + 3 + 4 // Now not 5 because it will be a repetition
0 + 1 + 2
1 + 2 + 3 + 4 + 5 // Now not 6 as it will include 2 again
4 + 5 + 6

I hope you understand now what CIRCULAR is referring to here.

#3

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