题解 | #最长公共前缀#

#coding:utf-8
#
# 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
#
# 
# @param strs string字符串一维数组 
# @return string字符串
#
class Solution:
    def longestCommonPrefix(self , strs ):
        # write code here
        if len(strs)==0 or (len(strs)==1 and strs[0]==""):
            return''
        if len(strs)==1:
            return strs[0]
        for i in strs:
            if i=="":
                return strs[0]
        a=strs[0]
        c=''
        d=0
        for i in strs:
            if len(str(i))<len(str(a)):
                a=i
        for i in range(1,len(a)+1):
            b=a[0:i]
            for j in strs:
                if b in j:
                    pass
                else:
                    d=1
            if d==0:
                c=b
            if d==1:
                break
        return c