前端突然报了integer overflow错误,int类型溢出也就是数字超过了int类型,一看很懵逼,查看后台日期发现是在Math.toIntExact()方法报错 那么我们看下方法内部代码: /** * Returns the value of the {@code long} argument; * throwing an exception if the value overflows an {@code int}. * * @param value the long value * @

0x00      Preview Last few passage I didn't conclude some important points and a general direction of the learning route of PWN. I browser some passages and finally I found one maybe suitable and reasonable for most PWN lovers: 0x01  Integer Overflow

整数越界情况 1. 数组下标越界, 大于N或者小于0 2. 数字过大,可以选择取个模,或者换long long, double  我笑了 还有一个暂时没有好的解决方法的:string s:cin/输入后才能使用较大的下标:若定义后手动赋值且下标较大也会显示越界(40就算较大下标,手动狗头) 欢迎广大网友指正

Reverse digits of an integer.Example1: x = 123, return 321Example2: x = -123, return -321Discuss: 1.If the integer's last digit is 0, what should the output be? ie, cases such as 10, 100.   2.Reversed integer overflow. using System; using System.Coll

From Wikipedia, the free encyclopedia       Animation showing how the date would reset, represented as a signed 32-bit integer (at 03:14:08 UTC on 19 January 2038). The Year 2038 problem is an issue for computing and data storage situations in which

pwn ”Pwn”是一个黑客语法的俚语词 ,是指攻破设备或者系统 .发音类似“砰”,对黑客而言,这就是成功实施黑客攻击的声音——砰的一声,被“黑”的电脑或手机就被你操纵.以上是从百度百科上面抄的简介,而我个人理解的话,应该就是向目标发送特定的数据,使得其执行本来不会执行的代码,前段时间爆发的永恒之蓝等病毒其实也算得上是pwn的一种. pwn介绍 CTF pwn中的目标是拿到flag,一般是在linux平台下通过二进制/系统调用等方式编写漏洞利用脚本exp来获取对方服务器的shell,然后get到

There are some Common Bugs in C Programming. Most of the contents are directly from or modified from Prof. Liu Pangfeng's blog. Most credits should go to him. For all the following problems, answer the output message of the code, unless they are spec

Python2 基本数据结构源码解析 Contents 0x00. Preface 0x01. PyObject 0x01. PyIntObject 0x02. PyFloatObject 0x04. PyStringObject 0x05. PyListObject 0x06. PyDictObject 0x07. PyLongObject 0x00. Preface 一切皆对象,这是Python很重要的一个思想之一,虽然在语法解析上有些细节还是不够完全对象化,但在底层源码里,这个思想还是贯穿

作者:张佩][原文:http://www.yiiyee.cn/Blog] 1. 概述 用户成功安装微软Windows调试工具集后,能够在安装目录下发现四个调试器程序,分别是:cdb.exe.ntsd.exe.kd.exe和Windbg.exe.其中cdb.exe和ntsd.exe只能调试用户程序,Kd.exe主要用于内核调试,有时候也用于用户态调试,上述三者的一个共同特点是,都只有控制台界面,以命令行形式工作. Windbg.exe在用户态.内核态下都能够发挥调试功能,尤其重要的是,它不再是命令

竞赛地址:https://ctf.isis.poly.edu/challenges/ 第一关:Trivia Trivia意思为琐事,每题分值50,比较简单 1.Drink all the booze, ____ all the things! 一首歌的歌词,答案为hack 2.What is the abbreviation of the research published in the Hackin9 issue on nmap by Jon Oberheide, Nico Waisman,

expressionexpr ::=     expr binary-op expr |expr [NOT] like-op expr [ESCAPE expr] |unary-op expr |( expr ) |column-name |table-name . column-name |database-name . table-name . column-name |literal-value |parameter |function-name ( expr-list | * ) |ex

catalog . SQLite简介 . Sqlite安装 . SQLite Programing . SQLite statements 1. SQLite简介 SQLite是一款轻型的数据库,是遵守ACID的关系型数据库管理系统,它包含在一个相对小的C库中.它是D.RichardHipp建立的公有领域项目.它的设计目标是嵌入式的,而且目前已经在很多嵌入式产品中使用了它,它占用资源非常的低,在嵌入式设备中,可能只需要几百K的内存就够了.它能够支持Windows/Linux/Unix等等主流的操

abs(X) abs(X)返回 X 的绝对值. Abs(X) returns NULL if X is NULL. Abs(X) return 0.0  if X is a string or blob that cannot be converted to a numeric value. If X is  the integer -9223372036854775807 then abs(X) throws an integer overflow error  since there is

Find Kth Largest Number public class Solution { public int findKthLargest(int[] nums, int k) { return findK(nums,nums.length - k,0,nums.length-1); } private int findK(int[] nums,int k, int start, int end){ int parti = nums[start],i=start,m=start; for

目录 概述 MemoryStream分析 总结 概述 事件起因,一哥们在群里面贴出了类似下面这样的一段代码: class Program { static void Main(string[] args) { byte[] buffer = File.ReadAllBytes("test.txt"); MemoryStream ms = new MemoryStream(buffer); ms.Dispose(); Console.WriteLine(ms.ToArray().Leng

嗷嗷的话: 这都是一些细枝末节的东西,我想不做编译器的话,大部分都很难碰到.研究学习这些只是出于对C语言一种偏执狂. 写出来是为了找到和我一样的偏执狂. 在随后的的文章中,首先我写一写191种undefined behavior.不一定是对的,只是我自己的理解.参考的标准是C99. undefined behavior简单来说就是,如果你的程序违反了C标准中某些准则,那么具体会发生什么,C标准没有定义,也就说得到任何奇怪的结果,都是有可能的.比如说整数溢出就是一个undefined behavi

Name                                             Disclosure Date  Rank    Description ----                                             ---------------  ----    ----------- aix/rpc_cmsd_opcode21                                          2009-10-07    

msf > show auxiliary Auxiliary ========= Name                                                  Disclosure Date  Rank       Description ----                                                  ---------------  ----       ----------- admin/2wire/xslt_pass

Given two integers representing the numerator and denominator of a fraction, return the fraction in string format. If the fractional part is repeating, enclose the repeating part in parentheses. For example, Given numerator = 1, denominator = 2, retu

3.3. Data TypesJava is a strongly typed language(强类型语音). This means that every variable must have a declared type(每个变量都必须声明类型). There are eight primitive types in Java(Java有8种原始类型). Four of them are integer types; two are floatingpoint number types;