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37 lines
1.0 KiB
Python
37 lines
1.0 KiB
Python
#!/usr/bin/python
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#
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# 100 coins must sum to $5.00
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#
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# That's kind of a country-specific problem, since depending on the
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# country there are different values for coins. Here is presented
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# the solution for a given set.
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#
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from constraint import Problem, ExactSumConstraint
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import sys
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def solve():
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problem = Problem()
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total = 5.00
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variables = ("0.01", "0.05", "0.10", "0.50", "1.00")
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values = [float(x) for x in variables]
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for variable, value in zip(variables, values):
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problem.addVariable(variable, range(int(total / value)))
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problem.addConstraint(ExactSumConstraint(total, values), variables)
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problem.addConstraint(ExactSumConstraint(100))
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solutions = problem.getSolutionIter()
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return solutions, variables
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def main():
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solutions, variables = solve()
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for i, solution in enumerate(solutions):
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sys.stdout.write("%03d -> " % (i + 1))
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for variable in variables:
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sys.stdout.write("%s:%d " % (variable, solution[variable]))
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sys.stdout.write("\n")
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if __name__ == "__main__":
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main()
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