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- var set = new HashSet<string>();
- Enumerable.Range(0, int.Parse(Console.ReadLine())).Select(t => Console.ReadLine()).ToList().ForEach(line =>
- {
- line.Select(t => t.ToString()).Aggregate((a, b) =>
- {
- var join = string.Join(String.Empty, a, b);
- set.Add(a);
- set.Add(join);
- return join;
- });
- });
- Console.WriteLine(set.Count);
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