和语言编写有关的杂项

写个头程序吧，随便整理一下，随便搞点事情

#include <time.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include <algorithm>
#define RG register
#define inline __inline__ __attribute__((always_inline))
#pragma __attibute__((optimize("-O1")))
#pragma __attibute__((optimize("-O2")))
#pragma __attibute__((optimize("-O3")))
#pragma __attibute__((optimize("-Os")))
#pragma comment(linker, "/STACK:102400000,102400000")
#define set_file(File) freopen(File".in","r",stdin),freopen(File".out","w",stdout)
#define close_file() fclose(stdin),fclose(stdout)
#define dmax(i,j) ((i)>(j)?(i):(j))
#define dmin(i,j) ((i)<(j)?(i):(j))
#define dabs(i) ((i)<(0)?(-i):(i))
#define dsqr(x) ((x)*(x))
#define lowbit(i)
__fastcall int A_Faster_Func(){
}
int main() {return 0;}