10: 00000 9: 00112223344566667888 8: 13456786: 8 4: 4 1: 9*
Many students did very well.
A few students did not provide correct answer for the second subproblem.
Most students only gave partially correct answers.
Most people got full points for this problem.
Many students did good job for this problem.
A few people did not provide result and description for their code.
Created by: En Cheng. Date: 2007-04-07. Last Modified by: Zheng Liu. Date: 2008-04-26.