1 a = True
 2 while True:
 3     number_one = int(input())
 4     if 1 <= number_one <= 1000:
 5         while a:
 6             number_two = input()
 7             test_array = number_two.split(" ")
 8             # print(test_array)
 9             for i in test_array:
10                 if int(i) >= 1000 or int(i) <= -1000:
11                     print("请重新输入")
12                     break
13                 else:
14                     a = False
15         break
16     else:
17         print("A请重新输入")
18 test_array = set(test_array)
19 print(len(test_array))
去重


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