For this project, you have to write 3 functions. C++ 1. remove_adjacent_digits. This takes in 2 arguments, a std::vector, and a std::vector of the same size. You need to return a std::vector, where each of the strings no longer has any digits that are equal to, one more, or one less, than the corresponding integer in the 2nd vector.

2. sort_by_internal_numbers. This takes in a single argument, a std::vector, and you need to return a std::vector, which is sorted as if only the digits of each string is used to make a number.

3. sort_by_length_2nd_last_digit. This takes in a std::vector>. It returns a vector of the same type as the input, which is sorted, first by the length of the string in the pair, and if they are the same length, then the second last digit of the int.

See the test cases for examples of each of the above functions.

You need to submit a single file called main. cpp that contains all these functions. You can (and should) write additional functions as well. There is no need for a main function.

No loops (for, while, etc) are allowed. You must use only STL algorithms for this project.