Add 'Prerequisites?' solution.
Add 'The Swallowing Ground' solution.
Add 'Searching for Nessy' solution.
Add 'Relational Operators' solution.
Add 'Summing Digits' solution.
Add 'Optimal Parking' solution.
Add 'Division of Nlogonia' solution.
Add 'Bender B. Rodríguez Problem' solution.
Add 'Automatic Answer' solution.
Add 'Train Tracks' solution.