Recursion
- driver.c
- fibBin.c, Fibonnaci numbers, exponential time.
- fibRec.c, recursive, linear time.
- fibItr.c, iterative, linear time.
- fibItr2.c, iterative, linear time.
- fibLog.c, recursive, logarithmic time.
- parentheses.c, generate strings of matched parentheses.
- permuteString.c, permutations of a string.
- permuteString2.c