题解 | #禁止重复注册#

# 明明就没问题,牛客真是有毛病.
# 列表生成式记得常用.
"""
current_users = ['Niuniu','Niumei','GURR','LOLO']
new_users = ['GurR','Niu Ke Le','LoLo','Tuo Rui Chi']
current_users_up = [i.upper() for i in current_users]
for i in new_users:
    if i.upper() in current_users_up:
        print('The user name %s has already been registered! Please change it and try again!' % i)
    else:
        print('Congratulations, the user name %s Le is available!' % i)
"""
current_users = ['Niuniu','Niumei','GURR','LOLO']
new_users = ['GurR','Niu Ke Le','LoLo','Tuo Rui Chi']
current_users_up = [i.upper() for i in current_users]
for i in new_users:
  if i.upper() in current_users_up:
    print('The user name {} has already been registered! Please change it and try again!'.format(i))
  else:
    print('Congratulations, the user name {} is available!'.format(i))