Please can you explain the logic behind this question

#1

Please can you explain the logic behind this question

Problem Random Query
#2

Hi Vivek
In this question a 1-indexed (indexing starts from 1) array is given. Now you choose two values l and r between 1 to n (both inclusive) where l has to be smaller than r ( l is left index r is right index). If l > r swap l and r. Now once you have chosen l and r you have to tell the expected value of number of unique elements in the array segment between l and r.
Basically koi bhi 2 indexes ke beech mei kitne unique values expected hai ye batao. To ye question maximum probability ka ban jayega ki 1 unique element ki prob sabse zyada hai ya 2 ki 3 ki etc.

#3

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#4

Can you please explain the formula to be used here with some examples

#5

@be10046.19 hey have a look at this code and dry run it,you will get it:

#6

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