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  1. Prepare
  2. Java
  3. Data Structures
  4. Java Hashset
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Java Hashset

  • whistle1203
     + 0 comments

    If you got a problem with the test case 5 try with lexicographic order:

     Set<String> hs = new HashSet<>();
        for (int i = 0; i < t; i++) {
            String first = pair_left[i];
            String second = pair_right[i];

            if (first.compareTo(second) > 0) {
                String temp = first;
                first = second;
                second = temp;
            }

            hs.add(first + "," + second);
            System.out.println(hs.size());
        }