Contains Duplicate — C# Coding Problem
Difficulty: easy | Category: array
Problem Description
Given an integer array `nums`, return `true` if any value appears at least twice in the array, and return `false` if every element is distinct.
Examples
Example 1
Input: nums = [1, 2, 3, 1]
Output: true
Example 2
Input: nums = [1, 2, 3, 4]
Output: false
Example 3
Input: nums = [1, 1, 1, 3, 3, 4, 3, 2, 4, 2]
Output: true