python基礎練習題

一、有一、二、三、4個數字，能組成多少個互不相同且無重複數字的三位數？都是多少？python list1 = [1,2,3,4] result = [] for x in list1: for y in list1: for z in list1: if x != y and x != z and y != z: a

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