题解 | 在字符串中找出连续最长的数字串

s = input()
flag = False
res = []
c = ''
f = 0
for i in s:
    f += 1
    if i.isnumeric(): 
        flag = True  #开启开关
    else:
        flag = False
    if i.isnumeric() and flag == True:
        c += i
    else:
        res.append(c)
        c = ''
    if flag == True and f == len(s): #以数字结尾的字符串，加到列表
        res.append(c)
    
maxlen = 0
str_res = ''
for i in res:
    if len(i)> maxlen:
        maxlen = len(i)
        str_res = i
    elif len(i) == maxlen:
        str_res += i
print(str_res +','+str(maxlen))