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 / monika

the formula given for summation shud be (n*(n+1))/2

but it will solve the problem only if we have one duplicate.
if we have many duplicates then we can still get the
correct summation
for ex:
1 2 2 5 5

it has two duplicates but still total is 5*(5+1)/2=15

Is This Answer Correct ?    28 Yes 12 No



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