Codechef
HackerRank
AlgoExpert.io
CodeForces
LeetCode
Coderbyte
Interview Cake
Codewars
Raindrop.io
Pinboard
Instapaper
Diigo
Tagpacker
start.me
Bookmark OS
My Mind
CodeChef is a not-for-profit educational initiative started by Directi more than a decade ago. We started with a dream of seeing an Indian team winning a gold medal at the ACM ICPC World Finals. In its quest for the same, CodeChef has built a self-driven community of the world's best programmers. Today more than 1.3 million competitive programmers from 180+ countries learn from CodeChef. CodeChef has been hosting monthly programming contests regularly for 10 years now. Its platform has assessed 92 million+ code submissions to date, and over 30000 organizations are being impacted by CodeCheffers worldwide. It also organizes SnackDown - one of the world's largest global programming competition whose last edition drew participation from 140+ countries. Since 2017, CodeChef has started providing India's only industry-ready certification in Data Structures and Algorithms, and 1800+ programmers have been certified under the same.
Codechef
Raindrop.ioBased on our record, Raindrop.io seems to be a lot more popular than Codechef. While we know about 190 links to Raindrop.io, we've tracked only 7 mentions of Codechef. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Have you heard of codeforces.com, atcoder.jp, codechef.com, etc? Source: over 2 years ago
Leetcode is good to learn basic algorithms because problem statements are usually straightforward. Competitive programming has much wider range of problems. Most popular sites for cp are codeforces.com , atcoder.jp, codechef.com . Source: over 2 years ago
Learn Java with hands-on experience. I personally used codingbat.com a lot, but I've heard good things about codechef.com, which appears to even have a competitive option. Source: over 3 years ago
For practicing algorithms, use any of the freely available websites like https://hackerrank.com https://codechef.com https://projecteuler.net A structured set of practice problems are available at https://www.interviewbit.com/courses/programming/ Avoid https://geeksforgeeks.org because it has a ton of material but very poor quality control. Source: about 4 years ago
These all have sample problems to solve Hackerrank.com edabit.com codewars.com codechef.com and there are tons more. Best of luck to you. I am at about the same level myself. I really like these sites. Source: over 4 years ago
I use Raindrop for this purpose: https://raindrop.io/ It doesn't scrape the article like Instapaper or Pocket, which I actually prefer since it keeps things simple and I can choose how I want to view the article. The only downside I've found so far is that URLs must be unique to each feed, so you can have multiple feeds but you can't put the same URL into multiple feeds. - Source: Hacker News / about 1 year ago
I moved to https://raindrop.io/. Imported all the Pocket stuff with no issues, free plan is enough for me. - Source: Hacker News / about 1 year ago
I personally use Raindrop.io [0]. I have used it for more than 3 years and it does it's job very well. [0] http://raindrop.io/. - Source: Hacker News / over 1 year ago
I have been using https://raindrop.io/ for this and find it quite useful. Never end up reading everything I save but it keeps my browser less chaotic and adding bookmarks from the browser extension and on iOS is quite seemless. - Source: Hacker News / over 1 year ago
You might be thinking of https://raindrop.io which is developed by a Kazakh developer? - Source: Hacker News / over 1 year ago
HackerRank - HackerRank is a platform that allows companies to conduct interviews remotely to hire developers and for technical assessment purposes.
Pinboard - Pinboard is a personal archive for things you find online and don't want to forget.
AlgoExpert.io - A better way to prep for tech interviews
Instapaper - Instapaper is a simple tool to save web pages for reading later.
CodeForces - Programming competitions and contests, programming community.
Diigo - Diigo is a powerful research tool and a knowledge-sharing community