Xu:
btree: 7.9s
hash: 6.6s (hash table = 100)
coding time: long

Petr:
btree: ?
hash: ? (hash table = 27)
coding time: 42 min

David:

coding time: 3 hrs

knorton:
hash: 0.127s

rocha:
?
coding time: ?

greg (java):
btree:
hash: 2.664s
coding time: ?

jasont:
btree: .2s/.06s
hash: 
coding time: 

jeff (perl):
hash: .3s
coding time: