ID #322:  (8/20)
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  -2:  No README file, so compiling is difficult
  -10: Problems 3 & 4 not testable (screen goes black after any user input)

ID #786:  (19/20)
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  -1:  Problem 4 the cone is inside out

ID #860:  (18/20)
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  -2:  Problem 4 the cone is not constructed correctly