For further reference, please visit the following links:
- https://en.wikipedia.org/wiki/String_(computer_science)
- https://www.geeksforgeeks.org/stdstring-class-in-c/
- https://en.wikipedia.org/wiki/Sort_(C%2B%2B)
- http://en.cppreference.com/w/cpp/algorithm/equal
- https://www.dcode.fr/binary-image
- http://en.cppreference.com/w/cpp/numeric/math/div
- https://en.wikipedia.org/wiki/Subsequence
- https://www.geeksforgeeks.org/power-set/
- https://en.wikipedia.org/wiki/Power_set
- https://www.geeksforgeeks.org/given-two-strings-find-first-string-subsequence-second/
- https://www.geeksforgeeks.org/subarraysubstring-vs-subsequence-and-programs-to-generate-them/
- https://www.geeksforgeeks.org/searching-for-patterns-set-1-naive-pattern-searching/
- https://www.dcode.fr/binary-image