Important sites related to coding

These days i am searching in  internet for more than 5 hours  a day and found some sites related to coding

hackerrank.com
hackerearth.com
topcoder.com

and some internship offerring websites as well

letsintern.com
twenty19.com

P.S. Dont settle for a job that pays you much. Learn something and live a life  which ll be useful for others