题解 | #字符串反转#

#使用正则表达式快速匹配最长“111”型字符串

import re
def dfx(er):
    conten, len_max = re.compile("1*"), 0
    resoult = re.findall(conten, er)
    for i in resoult:
        if len(i) > len_max:
            len_max = len(i)
    return len_max
while True:
    try:
        print(dfx(bin(int(input()))))
    except:
        break