Practice Questions:

https://www.hackerrank.com/contests/acmicl2/challenges/lexicographically-smaller

https://www.hackerrank.com/challenges/the-minion-game/problem?isFullScreen=true

https://www.hackerrank.com/challenges/merge-the-tools/problem?isFullScreen=true

https://www.hackerrank.com/challenges/word-order/problem?isFullScreen=true

https://www.hackerrank.com/challenges/compress-the-string/problem?isFullScreen=true

https://www.hackerrank.com/challenges/validating-credit-card-number/problem?isFullScreen=true

https://www.hackerrank.com/challenges/words-score/problem?isFullScreen=true

Topics to be familiar with:

• Lexicography
• Sequence and series