feat(hw1): add package declaration
docs(hw1): add program name
feat(hw1): move IntegerScanner to separate file
fix(hw1): add public modifier
fix(hw2): add package declaration
docs(hw2): add program name
fix(hw2): extract IntegerScanner class
fix(hw2): add public modifier to StableMarriage
fix(hw3): add public modifiers
docs(hw3): add program names
style: add empty line at end of file