Package hw1;
import java. util. TreeMap;
public class HW1 {
/**
* Inverts an array of Strings by returning a TreeMap that maps Strings to the smallest index in the array that contains the String.
*
* @param a an array of Strings
* @return a Map that given a String returns the smallest index of the array that contains the String
* (or null if String is not in the array a).
*/
public static TreeMap invert (String[] a) {
//TO DO
return null;
}
/**
* Computes the total number of occurrences of every String in an array.
*
* @param a an array of Strings
* @return a Map that given a String returns the number of occurrences of that String in the array
* (or null if String is not in the array a).
*/
public static TreeMap count (String[] a) {
/ / TODO
return null;
}
}
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