Added the implementation of problem 36.
Removed the println call from problem 32.
Added implementation of problem 37.
Added implementation of problem 43.
Added implementation of problem 44.
Updated the time class of problem 34.
Added implementation of problem 51.
Added implementation of problem 53.
Added implementation of problem 54.
Added implementation of problem 60.
Added implementation of problem 65.
Added implementation of problem 67.
Added partial implementation of problem 79.
Added implementation of problem 89.
Commented out the println call in the problem 79.