机考

最新推荐文章于 2025-12-25 14:57:52 发布

原创最新推荐文章于 2025-12-25 14:57:52 发布 · 233 阅读

0 ·

CC 4.0 BY-SA版权

文章标签：

#python

重排字符串去除除大小写字母，数字，以及‘-’以外的字符，倒序输出，其中只有‘-’两端连接有字母或数字时，可看作连词符，否则也要去掉。
示例：
输入：cow-baby @ -and- fishbaby
输出：fishbaby and cow-baby

def opera(s):
    ans = []
    stack = []
    for i in range(len(s)):
        if 'a' <= s[i] <= 'z' or 'A' <= s[i] <= 'Z' or '0' <= s[i] <= '9':
            stack.append(s[i])
        elif s[i] == '-':
            if 0 < i < len(s) - 1:
                if ('a' <= s[i - 1] <= 'z' or 'A' <= s[i - 1] <= 'Z' or '0' <= s[i - 1] <= '9') and ('a' <= s[i + 1] <= 'z' or 'A' <= s[i + 1] <= 'Z' or '0' <= s[i + 1] <= '9'):
                    stack.append(s[i])
                else:
                    if stack:
                        temp = ''.join(stack)
                        ans.append(temp)
                        stack = []
            else:
                if stack:
                    temp = ''.join(stack)
                    ans.append(temp)
                    stack = []
        else:
            if stack:
                temp = ''.join(stack)
                ans.append(temp)
                stack = []
    temp = ''.join(stack)
    ans.append(temp)
    return ans


while True:
    try:
        s = input()
        ans = opera(s)
        for i in range(len(ans) - 1,-1,-1):
            print(ans[i],end = ' ')
    except:
        break