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Railway circuit: Difference between revisions
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{{draft task}}
'''Railway circuit'''
Given n sections of curve tracks, each one being an arc of 30° of radius R, the goal is to build and count all possible different railway circuits.
'''Constraints''' :
'''Illustrations''' : http://www.echolalie.org/echolisp/duplo.html
'''Task
Write a function which counts and displays all possible circuits Cn for n = 12, 16 , 20. Extra credit for n = 24, 28, ... 48 (no display, only counts). A circuit Cn will be displayed as a list, or sequence of n Right=1/Left=-1 turns.
Example
C12 = (1,1,1,1,1,1,1,1,1,1,1,1) or C12 = (-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1)
'''Straight tracks (extra-extra credit)'''
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