C/C++ odds and ends
- deepest.c - return the deepest node of a binary tree (may be unbalanced)
- hamming.c - calculate hamming weight
- mergesort.c - merge sort https://en.wikipedia.org/wiki/Merge_sort
- rsentence.c - reverse the word order in a given sentence. O[1] memory
- sq.c - square root of a real number