FastIO 模板

#define gc getchar
#define pc putchar
inline int read(){
	int x=0;char c=gc();bool f=0;
	while(!isdigit(c)){if(c=='-')f=1;c=gc();}
	while(isdigit(c)){x=(x<<3)+(x<<1)+c-48;c=gc();}
	if(f)x=-x;
	return x;
}
inline void write(int x){
	if(x<0){pc('-');x=-x;}
	if(x>9)write(x/10);
	pc(x%10+'0');
}