Leetcode 288. Unique Word Abbreviation in Python | Python Leetcode | Python Coding Tutorial | ASMR

Published: 02 October 2025
on channel: Code is Art
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Leetcode 288. Unique Word Abbreviation in Python | Python Leetcode | Python Coding Tutorial | ASMR



Given an array nums containing n + 1 integers where each integer is between 1
and n (inclusive), prove that at least one duplicate number must exist. Assume that
there is only one duplicate number, find the duplicate one.
Example 1:
Input: [1,3,4,2,2]
Output: 2
Example 2:
Input: [3,1,3,4,2]
Output: 3
Note:
You must not modify the array (assume the array is read only).
You must use only constant, O(1) extra space.
Your runtime complexity should be less than O(n2).
There is only one duplicate number in the array, but it could be repeated more than
once.


Leetcode Problem Link: https://leetcode.com/problems/unique-...


Code Link : https://github.com/CodeIsArtYT/Leetco...

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