Algo questions

• What happens when I allocate memory space for line buffering and the lines of the stream have more bytes than the buffer space?
• What's D's "out" storage class useful for?
• What's the difference between iterator and back_insert_iterator?
• Speed up SymPy equation solver
• Why isn't to!int() working properly?
• Left recursion parsing
• How is union find quadratic algorithm?

Algo answers