Improved task 744. 

Added exec time 2080, 2151. 

Improved tasks 1106, 1108. 

Fixed sonar warnings. 

Added tasks 498, 500, 501, 502, 503. 

Added tasks 233, 234. 

Improved description for task 8. 

Introduced version 1.3 

Introduced version 1.2 

Introduced version 1.1