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== Data structures ==
== Data structures ==
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Data Dictionary ([http://java.sun.com/j2se/1.6.0/docs/api/java/util/TreeMap.html TreeMap] and [http://java.sun.com/j2se/1.6.0/docs/api/java/util/TreeSet.html TreeSet] for part 1)
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#Data Dictionary ([http://java.sun.com/j2se/1.6.0/docs/api/java/util/TreeMap.html TreeMap] and [http://java.sun.com/j2se/1.6.0/docs/api/java/util/TreeSet.html TreeSet] for part 1)
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# Related commands:
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#*Related commands:
#** [[createCity]]
#** [[createCity]]
#** [[listCities]]
#** [[listCities]]