RT,真的有这么大的差别啊！

快读1：

inline int read(){
	int ans=0,flag=1;
	char ch=getchar();
	while((ch>'9'||ch<'0')&&ch!='-') ch=getchar();
	if(ch=='-') flag=-1,ch=getchar();
	while(ch>='0'&&ch<='9'){
		ans=(ans<<1)+(ans<<3)+(ch^'0');
		ch=getchar();
	}
	return ans*flag;
}

这里是评测。

快读2：

using std::cin;
using std::cout;
using std::endl;
namespace IN{
    const int MAX_INPUT = 1000000;
    #define getc() (p1==p2&&(p2=(p1=buf)+inbuf->sgetn(buf,MAX_INPUT),p1==p2)?EOF:*p1++)
    char buf[MAX_INPUT],*p1,*p2;
    template<typename T>inline bool read(T &x) {
        static std::streambuf *inbuf=cin.rdbuf();
        x=0;
        register int f=0,flag=false;
        register char ch=getc();
        while(!isdigit(ch)){
            if (ch=='-') f=1;
        	ch=getc();
        }
        if(isdigit(ch)) x=x*10+ch-'0',ch=getc(),flag=true;
        while(isdigit(ch)) {
            x=x*10+ch-48;
            ch=getc();
        }
        x=f?-x:x;
        return flag;
    }
    template<typename T,typename ...Args>inline bool read(T& a,Args& ...args) {
       return read(a)&&read(args...);
    }
    #undef getc
}

namespace OUT{
    template<typename T>inline void put(T x){
        static std::streambuf *outbuf=cout.rdbuf();
        static char stack[21];
        static int top=0;
        if(x<0){
            outbuf->sputc('-');
            x=-x;
        }
        if(!x){
            outbuf->sputc('0');
            outbuf->sputc('\n');
            return;
        }
        while(x){
            stack[++top]=x%10+'0';
            x/=10;
        }
        while(top){
            outbuf->sputc(stack[top]);
            --top;
        }
        outbuf->sputc('\n');
    }
    inline void putc(const char ch){
        static std::streambuf *outbuf=cout.rdbuf();
        outbuf->sputc(ch);
    }
    inline void putstr(string s){
    	for(register int i=0;i<s.length();i++) putc(s[i]);
	}
    template<typename T>inline void put(const char ch,T x){
        static std::streambuf *outbuf=cout.rdbuf();
        static char stack[21];
        static int top = 0;
        if(x<0){
            outbuf->sputc('-');
            x=-x;
        }
        if(!x){
            outbuf->sputc('0');
            outbuf->sputc(ch);
            return;
        }
        while(x){
            stack[++top]=x%10+'0';
            x/=10;
        }
        while(top){
            outbuf->sputc(stack[top]);
            --top;
        }
        outbuf->sputc(ch);
    }
    template<typename T,typename ...Args> inline void put(T a,Args ...args){
        put(a);put(args...);
    }
    template<typename T,typename ...Args> inline void put(const char ch,T a,Args ...args){
        put(ch,a);put(ch,args...);
    }
}
using IN::read;
using OUT::put;
using OUT::putc;
using OUT::putstr;

时间这么快。

而且空间竟然也变少？？