Hi, all
I am not very clear about the question note "0 <= x,y < 2 to the power of 31".
As the parameter is int type, it would definitely be smaller than 2 to the power of 31.
The point of " 0 <= x,y < 2 to the power of 31"

@nathan Python's and Ruby's integers can be larger. Also, it's letting people know that they must actually expect the full range up to 2^{31}.