Problems from Waterloo Programming Contest 2010-07-10

Name
Fastest
Shortest
Authors
Full Solves
Ratio
Difficulty
Languages
Ideas0.14983211257%6.6Harden
Shopping0.1581120618087%4.6Mediumen
Stack Machine0.001391301963%6.6Harden
Tunnelling the Earth0.0025314212890%2.6Easyen