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28 lines
633 B
28 lines
633 B
from itertools import combinations
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from z3 import *
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solver = Solver()
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Colours = Datatype("Colours")
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Colours.declare("RED")
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Colours.declare("BLUE")
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Colours.declare("GREEN")
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Colours.declare("YELLOW")
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Colour = Colours.create()
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f = Function('f', IntSort(), Colour)
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variables = list()
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for i in range(0,5):
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variables.append(Int(i))
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solver.add(0 <= variables[-1])
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solver.add(variables[-1] <= 5)
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solver.add(Distinct(variables))
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for combi in combinations(variables,2):
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solver.add(Implies(Abs(combi[0] - combi[1]) == 1, f(combi[0]) != f(combi[1])))
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result = solver.check()
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if result == sat:
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print(solver.model())
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