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  1. Prepare
  2. Python
  3. Sets
  4. Set .add()
  5. Discussions

Set .add()

  • ay29020
     + 0 comments
    # Enter your code here. Read input from STDIN. Print output to STDOUT
N = int(input())
stamps = list(map(lambda _: input(), range(N)))
set_ = set()
for i in range(N):       
        set_.add(stamps[i])
print(len(set_))