How will the algorithm change if using LinkedHashSet instead of HashMap + ArrayList?

Replacing the HashMap + ArrayList combination with LinkedHashSet changes the algorithm as follows:

• Preserving insertion order. LinkedHashSet maintains the order of element addition, unlike HashMap, where the key order is not guaranteed.
• Element uniqueness. LinkedHashSet guarantees that elements are unique, similar to keys in HashMap.
• No key-value pairs. LinkedHashSet only stores elements, not key-value pairs, so if values are important in the original algorithm, they need to be stored separately.

Example:

// Instead of
Map<String, int> map = {};
List<String> list = [];

// You can use
LinkedHashSet<String> set = LinkedHashSet();

// Adding elements
set.add('element1');
set.add('element2');

// Iteration will preserve insertion order
for (var item in set) {
  print(item);
}

Thus, LinkedHashSet simplifies the structure by maintaining order and uniqueness, but it is not suitable if associated values are needed.