Given an array of size N in which every number is between 1
and N, determine if there are any duplicates in it. You are
allowed to destroy the array if you like.

Answer Posted / someone

Answer # eight by Zhixingren has one issue
consider following case
[3,3,1,4,5]

Here after processing first number value at index 2 will be
negative and after processing second number it will become
positive again

so when we process index it will have positive value and
code will not detect duplicate.

Mark no as negative if it is not negative will solve the
problem.

Is This Answer Correct ?    1 Yes 3 No



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