From Two days I am facing a lot of difficulties..Please help me out..

• As usual I was training myself @topcoder problems but I was not able to enter the practice rooms although I was able to login into the chat arena.Is anyone facing the same problem/What is the solution then??.I posted in the topcoder forums but got no replies[link]..So I thought of posting it here in codeforces which I feel has more active community.
• I was solving the USACO problem Mother's Milk[link].I solved it but I am getting TLE in the test case 20 10 9 which passes in my system in 2ms .I checked the number of times the recursive function is executed and it is only 24 for that case..Link to code..Please tell me why this is happeneing??

UPD: I had also reported the problem to the USACO team and after a few e-mail exchanges they came to the conclusion that the java grader was broken.They have fixed it now.And the above solution passes now :)

UPD2: Contacted service@topcoder.com and mystic_tc fixed the issue.Thanks to him :)