For the assignment 1, students usually did well on 1,5, and 6.
But they had a difficulty 2,3, and 4.
For 2, some of them didn't know how to start but still many students did well.
For 3, most of students did not consider negative case which may cause the
catastrophic cancellation. Also half of students didn't write algorithm
about factorial itself. They simply say n! which may not exist in most
of computer application.
For 4, one third of students didn't do properly.

Hae-Won Choi