Can you generate me some tests with answers?
I'd like to check my program.

Put R+,Q+. Try this:

1000000 1000000
1000000 1000000
1

1000000 1000000
999999 1000000
3

1000000 0
1 1000000
2

I think that answer on the last test must be 3.
(1+1000000i)*(-i)+i=1000000
(1+1000000i)*(1-i)-1-999999i=1000000
(1+1000000i)*0+1000000=1000000

Some random tests:
21 56
32 45
3

90 87
45 23
4

234 876
129 623
2

12345 65
8967 1345
3

4563 897
156 734
4

4 6
7 8
3