Returning duplicate elements in an array

InterviewQs

Returning duplicate elements in an array

Python Algorithms

Forward this email to a friend or colleague and challenge them to solve it.

Hi, 

Suppose you're given an array of positive integers of length n. Within the array, there will be one set of duplicate numbers. Write a function to read in the array and return the duplicate number.

For example:

    

input: a = [1,4,3,4,2]

output: 4

input: a = [4,3,1,1]

output: 1

Our solution will be written in Python for premium users.


 

You’ve accumulated 411 questions since joining our email list. Create a premium account to access detailed solutions to each problem (including this one) + our new Case studies.


Was this email forwarded to you? You can join our list here to receive questions

How did you like today's question?

15411 Boischatel, Montreal, QC, H9H1Y7, Canada
Don't want to get these emails anymore? We'll forgive you if you unsubscribe

Key phrases

Older messages

iPhone power button quality

Monday, February 13, 2023

Statistics, Significance Testing, Case Study, InterviewQs iPhone power button quality Statistics Significance Testing Case Study Forward this email to a friend or colleague and challenge them to solve

Garbage pickups and remaining capacity

Friday, February 10, 2023

SQL, Database Querying, Aggregation Functions, Join, InterviewQs Garbage pickups and remaining capacity SQL Database Querying Aggregation Functions Join Forward this email to a friend or colleague and

College football expenses by conference

Wednesday, February 8, 2023

Data Analysis, Python, Pandas, Data Manipulation, External Dataset, InterviewQs College football expenses by conference Data Analysis Python Pandas Data Manipulation External Dataset Forward this email

Generating automated tax estimates

Monday, February 6, 2023

Python, Algorithms, Logic, InterviewQs Generating automated tax estimates Python Algorithms Logic Forward this email to a friend or colleague and challenge them to solve it. Hi, Suppose you're

Probability of eye colors

Friday, February 3, 2023

Statistics, Probability Theory, Conditional Probability, InterviewQs Probability of eye colors Statistics Probability Theory Conditional Probability Forward this email to a friend or colleague and

You Might Also Like

Relief From Tinnitus: Free Discovery Call!

Tuesday, April 30, 2024

Do you suffer from tinnitus or a ringing in your ears? 1 in 3 adults over the age of 65 will suffer from this condition and often don't know there are things you can do to help. Our friends at

WebAIM April 2024 Newsletter

Tuesday, April 30, 2024

WebAIM April 2024 Newsletter Read this newsletter online at https://webaim.org/newsletter/2024/april Feature Web Accessibility in the 2024 Presidential Campaigns WebAIM's John Northup ran the US

👀 Being More Productive on a Smaller Screen — How to Hide Games on Steam Family Sharing

Tuesday, April 30, 2024

Also: What to Expect From Apple's "Let Loose" Event, and More! How-To Geek Logo April 30, 2024 Did You Know The letter J is the only letter that makes no appearance on the Periodic Table.

PEP 686, Lazy Evaluation, Serverless Python, and More

Tuesday, April 30, 2024

PEP 686: Make UTF-8 Mode Default #627 – APRIL 30, 2024 VIEW IN BROWSER The PyCoder's Weekly Logo PEP 686: Make UTF-8 Mode Default This Python Enhancement Proposal outlines making UTF-8 the default

Daily Coding Problem: Problem #1427 [Easy]

Tuesday, April 30, 2024

Daily Coding Problem Good morning! Here's your coding interview problem for today. This problem was asked by Amazon. Given an array and a number k that's smaller than the length of the array,

🎙 My advice for film + TV creatives on the AI wave

Tuesday, April 30, 2024

Learning AI fast + Karate Kid references ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌

Ranked | The Top 20 Countries in Debt to China 💸

Tuesday, April 30, 2024

The 20 nations featured in this graphic each owe billions in debt to China, often posing concerns for their economic future. View Online | Subscribe Presented by Voronoi: The App Where Data Tells the

Noonification: RaspberryPi: Technology Overload - LAMP🕯 to UASP🐝

Tuesday, April 30, 2024

Top Tech Content sent at Noon! The first AI-powered startup unlocking the “billionaire economy” for your benefit How are you, @newsletterest1? 🪐 What's happening in tech this week: The

Issue #50: ScreenFloat by Matthias Gansrigler

Tuesday, April 30, 2024

Today, we're looking at ScreenFloat by Matthias Gansrigler. ScreenFloat is a screenshot management utility that lets you create floating screenshots so you can easily reference them no matter what

You're invited - Taking the Guesswork out of Product Development

Tuesday, April 30, 2024

Taking the Guesswork out of Product Development Tuesday, May 14th @ 2:00PM GMT // 10:00 AM EST Approximately 50% of product budgets are allocated to reworking and optimizing post-launch experiences.