Sample solutions. 

These solutions are well written and pass all the corresponding tests.
You can run them automatically with `make check' in tests/.

The patches must be applied in order. For example, to get a solution for
Project 3, invoke the following commands in the Pintos top-level directory:
    patch -p1 < p1.patch
    patch -p1 < p2.patch
    patch -p1 < p3.patch