shouya

1.upto(17) do |x|
  1.upto(10) do |y|
    url = "http://media.pearsoncmg.com/intl/ema/9780435074968_" \
          "Garry_Wazir/workedsolutions/HL_Exercise_" \
          "#{x}.#{y}_Worked_Solutions.pdf"

    `wget -c #{url}`
  end
  url = "http://media.pearsoncmg.com/intl/ema/9780435074968_" \
        "Garry_Wazir/workedsolutions/" \

shouya

x(l,x0) := if equal(l,1) then
    x0[2] * t - x0[1] * t + x0[1]
else
    expand(x(1,[x(l-1,makelist(x0[i],i,1,length(x0)-1)),
                x(l-1,makelist(x0[i],i,2,length(x0)))]));


usage:
factor(x(2,[x[0],x[1],x[2]]));

shouya

; -*- scheme -*-


(define (derivative expr var)
  (cond
   ((number? expr) 0)
   ((variable? expr) (if (eq? expr var) 1 0))
   ((sum? expr)
    (make-sum (derivative (addend expr) var)
              (derivative (augend expr) var)))

shouya

Macros

Original Text

permanent link

Scheme programs can define and use new derived expression types, called macros. Program-defined expression types have the syntax

(<keyword> <datum> ...)

where is an identifier that uniquely determines the

shouya

Level1

PHP backdoor(level1):

http://logic.smashthestack.org:8181/uploads/PHPJackal.php

Execute cat /home/level1/.bash_history and find password inside.

Level2

shouya

#!/bin/sh

##
## This file is for replace the typical init program, do some
## pre-checking work before shutting down or other stuff.
##
## Written by Shou Ya, at 23 June, 2012
##
##

shouya

#!/usr/bin/env bash
# -*- shell-script -*-

# cas - c as script
# A script which support act C language code as a script.
#
# Usage:
#  cas [COMPILE_OPTIONS] [source_file] [EXECUTE_ARGUMENTS]
# the source_file should be appoint otherwise it'll use /dev/stdin automically.
#

shouya

#
# This script is a convenient tool that takes colordict history from stdin
# and filters all starred vocabularies, queries the dict for meaning, then outputs
# a file for anki to import.
#
# Requires:
#  * sdcv (stardict commandline version)
#
#
# This script is licensed by WTFPL.

shouya

int __stdcall UnLockPwd(int a1, int a2)
{
  signed int v2; // esi@1
  int v3; // edx@1
  int v4; // ecx@1
  signed int v5; // edi@1
  int v6; // eax@2
  int i; // esi@2
  signed int j; // esi@6
  signed int k; // esi@11

shouya

vdisk.weibo.com##A[id="toolbar_download_forward"][class="W_btn_b"]
vdisk.weibo.com##A[id="toolbar_save_forward"][class="W_btn_b"]
weibo.com##A[class="gn_tab gn_member"]
weibo.com##DIV[id="trustPagelet_recom_interestv5"]
weibo.com##DIV[class="W_rightModule"]
weibo.com##DIV[id="trustPagelet_zt_hottopicv5"]
weibo.com##DIV[class="WB_right_module"]
weibo.com##DIV[id="pl_leftnav_group"][class="level_2_Box"]
weibo.com##DIV[id="pl_leftnav_app"]
weibo.com##A[href="http://club.weibo.com/intro"]