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 ## Competitive programming
 - [Topic Wise Problem For Competitive Programmer](https://a2oj.com/categories) : Topic wise Practise Problem
+- [Advent of Code](https://adventofcode.com) : An Advent calendar of small programming puzzles
 - [Archived Problems - Project Euler](https://projecteuler.net/archives) : Problems Archives
 - [Art of Problem Solving](https://artofproblemsolving.com) : Is math class too easy for you? You've come to the right place!
 - [CodeChef](https://www.codechef.com) : The only programming contests Web 2.0 platform