02. Linear-Data-Structures - solved partially
03. Trees-and-Traversals - partially
04. Dictionariy-HashTables-Sets - solved: 01., 02., 03. bug fix need, 04. almost nothing
01. Complexity
02. Linear-Data-Structures
03. Trees-and-Traversals
04. Dictionariy-HashTables-Sets - 01, 02, 03 (partially)