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旧键盘上坏了几个键,于是在敲一段文字的时候,对应的字符就不会出现。现在给出应该输入的一段文字、以及实际被输入的文字,请你列出肯定坏掉的那些键。
输入在 2 行中分别给出应该输入的文字、以及实际被输入的文字。每段文字是不超过 80 个字符的串,由字母 A-Z(包括大、小写)、数字 0-9、以及下划线 _
(代表空格)组成。题目保证 2 个字符串均非空。
按照发现顺序,在一行中输出坏掉的键。其中英文字母只输出大写,每个坏键只输出一次。题目保证至少有 1 个坏键。
7_This_is_a_test
_hs_s_a_es
7TI
1.本质为求两集合的差集,但题目要求按发现的顺序进行输出,如果直接进行差集运算,差集的顺序会有不同
2.所以采用遍历的方法进行判断,题目又要求英文字母要转为大写输出,所以需要一个列表来存放转为大写后的字符
Full = list(input()) # 应该输入的文字 Part = set(list(input())) # 实际输入的文字,用集合去重 Difference = list() # 存放Full与Part的差集 for i in range(len(Full)): # 遍历Full中的字符,判断是否存在于Part和差集中 if Full[i] not in Part and str(Full[i]).upper() not in Difference: # 该字符及其大写第一次出现 Difference.append(str(Full[i]).upper()) # 存放该字符的大写 for i in range(len(Difference)): print(Difference[i], end='')
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