14. 最长公共前缀

def find_com_str(l):

    m =max(l)

    n =min(l)

    print max(l)

    if len(l) ==0:

    return ""

       le1 =len(n)

    for iin range(le1):

    if m[i] != n[i]:

        return m[0:i]

if __name__ =='__main__':

    l = ["fw1lwer","fw1low","fw1lwight"]

    print find_com_str(l)