You are expected to maintain the utmost level of academic integrity. This means that all work you and your partner submit must be the result of only your pair's joint effort. You are allowed to consult other books on homework, but you must cite your sources and write up your answers in such a way as to demonstrate that you understand the published solutions --- merely copying answers from other books is not acceptable.
You may discuss homework problems, general proof strategies or algorithms with other students in the course, but you may not collaborate with anyone but your partner in the development of detail or actual writing of problem sets, e.g.\ you may not work from written notes developed collaboratively with anyone besides your partner. This implies that one student should never possess a copy of all or part of another pair's homework. It is your own responsibility to protect your work from unauthorized access.
The exams must be entirely your own work.
Academic dishonesty has no place in a university: It wastes our time and yours, and is unfair to the majority of students. Any violation of this code will be penalized and can lead to failure in the course. When in doubt, ask beforehand!