Strony z zadaniami programistycznymi

http://acm.hit.edu.cn/judge/ProblemIndex.php
http://adventofcode.com
http://bloc.io/ruby-warrior/#
http://checkio.org
http://code.google.com/codejam/contests.html
http://codeabbey.com
http://codechef.com
http://codeeval.com
http://codefights.com
http://codeforces.com
http://codegolf.stackexchange.com
http://codekata.com
http://coderbyte.com
http://codewars.com
http://codility.com
http://codingame.com/start
http://codingbat.com
http://domino.research.ibm.com/comm/wwwr_ponder.nsf/pages/index.html
http://eetcode.com
http://exercism.io
http://github.com/karan/Projects
http://hackerearth.com
http://hackerrank.com
http://ipsc.ksp.sk/archive
http://mindcoding.ro
http://mycodeschool.com/problems
http://oj.leetcode.com
http://pexforfun.com
http://poj.org
http://programmingpraxis.com
http://projecteuler.net
http://pythonchallenge.com
http://reddit.com/r/dailyprogrammer
http://research.ibm.com/haifa/ponderthis/index.shtml
http://rosalind.info
http://rosettacode.org
http://spoj.com
http://uva.onlinejudge.org
http://i.imgur.com/enBOLSg.jpg