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Coding Challenge Platforms

Users recommend and discuss online platforms like LeetCode, Project Euler, HackerRank, and Advent of Code for practicing algorithmic and programming problems to build coding skills.

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Top Contributors

Jtsummers (21) saagarjha (13) eru (13) matsemann (13) jschulenklopper (11)

Keywords

LeetCode ICPC IDE codewars.com HN projecteuler.com hackerrank.com problemset.php acm.sgu reddit.com problems leetcode solve problems solve project solutions challenging code programming input

Sample Comments

UltraSane • Nov 22, 2025 • View on HN

I have it do hard Leetcode problems and then read the code and have it explain parts I don't understand.

vismit2000 • Nov 13, 2025 • View on HN

Maybe you can try Project Euler: https://news.ycombinator.com/item?id=45906193

revskill • Jan 4, 2025 • View on HN

I thought it's about solving Leetcode problems.

frozenport • Jul 14, 2014 • View on HN

How many Project Euler problems can you solve?

sergiotapia • Jun 23, 2019 • View on HN

No, I don't want to solve leetcode style questions. Give me normal takehomes or at worst normal problems to solve on the computer.

sanderjd • Aug 26, 2015 • View on HN

What about project Euler and the like?

anewhnaccount • Nov 29, 2014 • View on HN

It's for practising infomatics olympiad style programming problems.

mtmail • Aug 4, 2015 • View on HN

If you're into algorithms try https://projecteuler.net/

thunkshift1 • Dec 9, 2025 • View on HN

Somehow algodrill and leetcode managed to survive the ai onslaught

charonn0 • Nov 15, 2012 • View on HN

It's somewhat reminiscent of RosettaCode or Project Euler, too.