easyArraysPattern: Linear Scan
First Duplicate Node Solution
Problem Statement
You are given an array of integers `nodeIds` of size `n`, containing unique identifiers for surveillance nodes. The task is to perform a linear scan of the array and identify the first duplicate node ID found, which represents the breached node.
Examples
Example 1:
Input:[1, 2, 3, 4, 5, 2]
Output:2
Explanation: The first duplicate found in the array is 2.
Example 2:
Input:[1, 2, 3, 4, 5, 6, 7, 8, 9, 1]
Output:1
Explanation: The first duplicate found in the array is 1.
Constraints
- 1 <= n <= 10^5
- array elements are 0 or 1.
Time: O(N) Space: O(1)
The optimized approach involves using a linear scan with a time complexity of O(n) to find the breached node.
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