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 / yegullelew

I have tried it with c#. It is of O(2n)~O(n)
public bool tellIfDuplicate(params int[] nums)
{
for (int i = 0; i < nums.Length; i++)
{
if (nums[i] != i + 1)
{
int temp = nums[i];
nums[i] = nums[nums[i] - 1];
nums[nums[i] - 1] = temp;
}
}
for(int i=0;i<nums.Length;i++)
if(nums[i]!=i+1)
return true;
return false;
}

Is This Answer Correct ?    8 Yes 12 No



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