Full name:  _____Zhengxuan WU_________
SEAS login: ______wuzhengx________

Which features did you implement? 
  (list features, or write 'Entire assignment')
  Entire assignment
Did you complete any extra-credit tasks? If so, which ones?
  (list extra-credit tasks)
  No

Did you personally write _all_ the code you are submitting
(other than code from the course web page)?
  [X] Yes
  [ ] No

Did you copy any code from the Internet, or from classmates?
  [ ] Yes
  [X] No

Did you collaborate with anyone on this assignment?
  [ ] Yes
  [X] No