一些封装

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namespace my_std{
	using namespace std;
    #define Re register
    #define rep(i,a,b) for(Re int i=(a);i<=(b);i++)
    #define drep(i,a,b) for(Re int i=(a);i>=(b);i--)
    #define repv(i,v) if(v.size())rep(i,0,v.size()-1)
    #define drepv(i,v) if(v.size())drep(i,v.size()-1,0)
    #define go(u) for(Re int i=head[(u)];i;i=e[i].nxt)
    #define pf printf
    #define writesp(x) write(x),putchar(‘ ‘),IO::check()
    #define writeln(x) write(x),putchar(‘\n‘),IO::check()
    #define mem(x,v) memset(x,v,sizeof(x))
    #define pb push_back
    #define ZSH return
    #define AKIOI 0
    typedef long long ll;
    const int INF=0x7fffffff;
	char buf[1<<22],out[1<<22],*p1=buf,*p2=buf;
	int p3=-1,f=0;
	inline void file(){
		#ifdef ZSHAKIOI
		freopen("1.in","r",stdin);
		#endif
	}
	inline int getchar(){return (p1==p2)&&(p2=(p1=buf)+fread(buf,1,1<<21,stdin),p1==p2)?EOF:*p1++;}
	inline void flush(){fwrite(Out,1,p3+1,stdout),p3=-1;}
	inline void check(){if(p3>(1<<21))flush();}
	inline void putchar(char a){Out[++p3]=a;check();}
	inline void putline(string s){
		int tmp=p3;
		while(p3-tmp<s.size())putchar(s[p3-tmp]);
		putchar(‘\n‘);
	}
	inline char gc(){
		char c=getchar();
		while(!c||c==‘\n‘||c==‘ ‘)c=getchar();
		return c;
	}
	inline int read(){
		int sum=0,f=0;char c=getchar();
		while(!isdigit(c))f|=(c==‘-‘),c=getchar();
		while(isdigit(c))sum=(sum<<1)+(sum<<3)+(c^48),c=getchar();
		return f?-sum:sum;
	}
	void write(int k){
		if(k<0)putchar(‘-‘),k=-k;
		write(k/10);
		putchar(k%10+48);
	}
}

一些封装

标签：sum   etc   space   back   for   namespace   mem   mes   register   

原文地址：https://www.cnblogs.com/ZTC2019/p/13373223.html