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 / anyone
If you mark places with zero, you will lose the original
value in that place which, eventually, leads to errors...
Assume an array starting as: 1-5-5-...
After first step array would be: 1-0-5-...
You will get stuck at the second step since every element
that you marked with zero will lead to the position 0.
Converting to negative makes more sense...
Is This Answer Correct ? | 14 Yes | 9 No |
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