Competitive programming resource links that are helpful to me.

competitive-programming-resource-links

An awesome list for competitive programming 
https://github.com/lnishan/awesome-competitive-programming

Code chef : DS+ALGO links
https://discuss.codechef.com/questions/64940/ds-and-algo-competitive-programming-all-you-need

Igor's code archive 
http://shygypsy.com/tools/

Geeks for geeks : how to win kickstart
https://www.geeksforgeeks.org/prepare-google-kickstart/

Hacker earth : getting started with competetive programming
https://www.hackerearth.com/practice/notes/getting-started-with-the-sport-of-programming/

T-414-AFLV by Bjarki Ágúst Guðmundsson
https://algo.is/t-414-aflv-competitive-programming-course-2016/

Codechef : Advancing in competitive programming
https://discuss.codechef.com/questions/90938/need-advice-on-how-to-advance-further-in-competitive-coding

Stanford : ACM-ICPC training course by Jaehyun Park 
http://web.stanford.edu/class/cs97si/

Youtube channels to follow :
+ code_report
+ geeks for geeks
+ tushar roy
+ gaurav sen