python查找最長公共前綴

編寫一個函數來查找字符串數組中的最長公共前綴。

如果不存在公共前綴，返回空字符串 ""。

示例 1:

輸入: ["flower","flow","flight"]
輸出: "fl"

示例 2:

輸入: ["dog","racecar","car"]
輸出: ""
解釋: 輸入不存在公共前綴。

說明:

所有輸入只包含小寫字母 a-z 。

class Solution:
    def longestCommonPrefix(self, strs):
        """
        :type strs: List[str]
        :rtype: str
        """
        if not strs:
            return ''
        s1 = min(strs)
        s2 = max(strs)
        for i,j in  enumerate(s1):
            if j != s2[i]:
                return s1[:i]
        return s1
if __name__ == '__main__':
    s=Solution()
    print(s.longestCommonPrefix(["flower","flow","flight"]))