2. I like timus but IMHO sgu is better. Just one example... (I have more but they all alike) I wrote solution to problem 1005. Stone pile. Timus said that it's ACCEPTED. Then I generated about 20 random tests. My "AC" program FAILED on 50% of these tests! It's not good at all! BTW, I don't know about such examples on SGU.
3. Good luck to all who tries to make timus better! No need to be upset 'cause UVA is worse than TIMUS
Why are you so sure you program failed them? It's rather difficult to check large random test without the correct answer (I mean, finding it yourself). In case it's TL, maybe your computer has less performance or you are using a different check system that counts astronomical time (if you have a lot of other processes it might have considerable effect).