Challenge: First Non-Repeating Integer in an Array

Try to solve the First NonRepeating Integer in an Array problem.

We'll cover the following

Statement

Given an array nums, find the first nonrepeating integer in it.

Constraints:

  • 1≤1 \leq nums.length ≤103\leq 10^3

  • −104≤-10^4 \leq nums[i] ≤104 \leq 10^4

Examples

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