• 百米

3秒提交答案，数字是随机变化的

利用Python脚本解题

# -*- coding:utf-8 -*-__author__ = "MuT6 Sch01aR"import requestsfrom bs4 import BeautifulSoupimport sys,iourl = "http://ctf5.shiyanbar.com/jia/index.php"url_check = "http://ctf5.shiyanbar.com/jia/index.php?action=check_pass"s = requests.session()respons = s.get(url)soup = BeautifulSoup(respons.text,features="html.parser")a = soup.find("div",attrs={"name":"my_expr"}).get_text()a = a.replace("x","*")response = s.post(url_check,data={"pass_key":eval(a)})response.encoding = response.apparent_encodingsoup1 = BeautifulSoup(response.text,features="html.parser")b = soup1.find("div",attrs={"id":"templatemo_content"})sys.stdout = io.TextIOWrapper(sys.stdout.buffer,encoding='gb18030')print(b)

 运行，得到flag

• 找素数

利用python脚本解题

# -*- coding:utf-8 -*-__author__ = "MuT6 Sch01aR"from math import *a = 367-186b = 186c = 0while True:    a += b    for i in range(2,int(sqrt(a))+1):        if a % i == 0:            break        else:            if i == int(sqrt(a)):                c += 1                if c == 151:                    print("CTF{",a,"}")                    break    if c == 151:        break

 运行，得到flag