Challenge: First Non-Repeating Integer in a List

Given a list, find the first integer which is unique in the list. Unique means the number does not repeat and appears only once in the whole list. Implement your solution in Python and see if it runs correctly.

We'll cover the following

Problem Statement
Coding Challenge

Problem Statement

Implement a function, find_first_unique(lst) that returns the first unique integer in the list.

Input

A list of integers

Output

The first unique element in the list

Sample Input

[9,2,3,2,6,6]

Sample Output

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Introduction to Complexity Measures

Introduction to Lists

Introduction to Linked Lists

Introduction to Stacks and Queues

Introduction to Graphs

Introduction to Trees

Trie

Introduction to Heap

Introduction to Hashing

Summary of Data Structures