lists.rkt

#reader(lib"read.ss""wxme")WXME0108 ## 
#|
   This file uses the GRacket editor format.
   Open this file in DrRacket version 6.6 or later to read it.

   Most likely, it was created by saving a program in DrRacket,
   and it probably contains a program with non-text elements
   (such as images or comment boxes).

            http://racket-lang.org/
|#
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(
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(
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(
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#";; add-up-3 : list-of-3-numbers  ->  number"
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0 0 18 3 53 #";; to add up the three numbers in a-list-of-3-numbers"
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0 0 18 3 23 #";; examples and tests: "
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0 0 18 3 54 #";;   (= (add-up-3 (cons 2 (cons 1 (cons 3 empty)))) 6)"
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(
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