Python 解法, 执行用时: 9ms, 内存消耗: 2964KB, 提交时间: 2022-07-26

# coding=utf-8
current_users = ['Niuniu','Niumei','GURR','LOLO']
new_users = ['GurR','Niu Ke Le','LoLo','Tuo Rui Chi']
for j in new_users:
    flag=0
    for i in current_users:
        if i.lower()==j.lower():
            print("The user name {} has already been registered! Please change it and try again!".format(j))
            flag=1
            break;
    if flag==0:
        print("Congratulations, the user name {} is available!".format(j))

Python 解法, 执行用时: 10ms, 内存消耗: 2836KB, 提交时间: 2022-07-11

current_users = ['Niuniu','Niumei','GURR','LOLO']
new_users = ['GurR','Niu Ke Le','LoLo','Tuo Rui Chi']
for name in new_users:
    if name.upper() in current_users:
        print('The user name {} has already been registered! Please change it and try again!'.format(name))
    else:
        print('Congratulations, the user name {} is available!'.format(name))

Python 解法, 执行用时: 10ms, 内存消耗: 2836KB, 提交时间: 2022-06-21

current_users = ["Niuniu","Niumei","GURR","LOLO"]
new_users = ['GurR','Niu Ke Le','LoLo','Tuo Rui Chi']
lower_current_users = [i.lower() for i in current_users]
for user in new_users:
    if user.lower() in lower_current_users :
        print('The user name {} has already been registered! Please change it and try again!'.format(user))
        
    else:
        print('Congratulations, the user name {} is available!'.format(user))

Python 解法, 执行用时: 10ms, 内存消耗: 2836KB, 提交时间: 2022-06-10

a = ["Niuniu", "Niumei", "GURR", "LOLO"]
b = ["GurR", "Niu Ke Le", "LoLo", "Tuo Rui Chi"]
for x in b:
    for y in a:
        if x.upper() == y.upper():
            print("The user name {} has already been registered! Please change it and try again!".format(x))
            break;
    else:
        print("Congratulations, the user name {} is available!".format(x))

Python 解法, 执行用时: 10ms, 内存消耗: 2840KB, 提交时间: 2022-07-16

current_users =['Niuniu','Niumei','GURR','LOLO']
new_users =['GurR','Niu Ke Le','LoLo','Tuo Rui Chi']
# new_users = [i.upper() for i in new_users]
for i in new_users:
    if i.upper() in current_users:
        print('The user name %s has already been registered! Please change it and try again!'%i)
    else:
        print('Congratulations, the user name %s is available!'%i)