Hi,
as you can see on the bottom of the ranks-site, there it says:
As the two classical problems, you solved, also have been solved by many people, those two scores don't add up to MORE than 0.1 ... so just keep on solving problems or try to solve problems which haven't been solved by so many other people.
80/(40+7182) + 80/(40+2281) = 0.0110772639 + 0.0344679018 = 0.0455451657
which is even <0.1 (your score)
Good luck