Pinboard
Raindrop.io
Diigo
Tagpacker
Instapaper
wallabag
Papaly
start.me
Codechef
HackerRank
AlgoExpert.io
CodeForces
LeetCode
Coderbyte
Interview Cake
Codewars
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.
Pinboard
CodechefWhile all the other bookmarking sites have died, pinboard.in remains and is a reliable and handy place to save all those links you love but are sure to otherwise forget.
Based on our record, Pinboard seems to be a lot more popular than Codechef. While we know about 76 links to Pinboard, 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.
Shout out to Pinboard for making bookmarking pages and adding notes incredibly easy. They have a bookmarklet that sits on my bookmarks toolbar and if I like a page/tweet/video etc I just hit the "Add pin", enter some tags and hit enter. This works so well that I went through and bookmarked and tagged all of my LinkedIn connections as well (inspired by a post from Derek Sivers [1]). People are generally amazed at... - Source: Hacker News / 5 months ago
I switched to using Pinboard [0] for all bookmarking and never looked back. The real unlocks were: - using the bookmarklet that pops open a small browser window with the page title, suggested tags - doing the same on my iphone - have a couple in browser bookmarks that point to the tags for important things It's so good I even used it to track all of my LinkedIn connections tagged by location, job function etc... - Source: Hacker News / 7 months ago
Https://pinboard.in Simple, usable, timeless. - Source: Hacker News / 9 months ago
Pinboard.in. Also pay the $20/yr for archiving if the links rot https://pinboard.in/. - Source: Hacker News / about 1 year ago
The classic https://pinboard.in/, maybe? I haven't used it, but it tempts me a few times per decade. - Source: Hacker News / about 1 year ago
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
Raindrop.io - All your articles, photos, video & content from web & apps in one place.
HackerRank - HackerRank is a platform that allows companies to conduct interviews remotely to hire developers and for technical assessment purposes.
Diigo - Diigo is a powerful research tool and a knowledge-sharing community
AlgoExpert.io - A better way to prep for tech interviews
Tagpacker - A free tool to quickly collect, organize, and share your favorite links.
CodeForces - Programming competitions and contests, programming community.