Title Description The site does not allow two users to have the same account name, so an account re-query mechanism is required. Alice, Bob, Lucky, Kitty, Tim, Lucy, Jim, Helena. Enter an account name to determine whether the account name is available. Enter the format Each line of input data is an account name, account name length < 50. If END is entered, the program ends. Output format Account does not re-name the output YES , otherwise the output NO Enter the sample Alice Woods END Output sample NO Yes

shuzupaixu.o
zhanghaochongming.cpp

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