For me it was very helpful to read "CRACKING the CODING INTERVIEW" book and solving tasks from https://www.hackerrank.com/domains/tutorials/cracking-the-coding-

For me it was very helpful to read "CRACKING the CODING INTERVIEW" book and solving tasks from https://www.hackerrank.com/domains/tutorials/cracking-the-coding-interview https://www.hackerrank.com/domains/tutorials/cracking-the-co....