关于 bits/stdc++.h

这个头文件功能倒是很强大，将c++能用上的头文件差不多都集成了

想写这个主要是因为最近杭电好像能用这个交了2333（就在这几天左右，前天交还是CE呢）

在这里主要说一些使用上的问题：

最重要的一点：永远不要把锅甩给编译器！

因为它集成了大量的头文件 所以要注意，在起变量名字的时候 一定要注意 不要与系统里原有的函数冲突。

变量命名方式网上一抓一大把 在此不多赘述。再说，要是起变量名字总是a,b,c这种竞赛写法啊，或者是什么max min abs这样会冲突的写法，丢人，哈哈哈

注：要用g++交

粘一发源码

// C++ includes used for precompiling -*- C++ -*-

// Copyright (C) 2003-2014 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library.  This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.

// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.

// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
// .

/** @file stdc++.h
 *  This is an implementation file for a precompiled header.
 */

// 17.4.1.2 Headers

// C
#ifndef _GLIBCXX_NO_ASSERT
#include 
#endif
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 

#if __cplusplus >= 201103L
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#endif

// C++
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include