求fread+fwrite读优

#include<bits/stdc++.h>
#define BUFF_SIZE 1<<15
#define get_ch() (fs==ft&&(ft=(fs=read_buf)+fread(read_buf,1,BUFF_SIZE,stdin),fs==ft))?0:*fs++
#define push(ch) p-write_buf==BUFF_SIZE?fwrite(write_buf,1,BUFF_SIZE,stdout),p=write_buf,*p++=ch:*p++=ch
using namespace std;
namespace fastIO{
    char read_buf[BUFF_SIZE],write_buf[BUFF_SIZE],*fs,*ft,*p=write_buf;
    template<typename _Tp>
    inline void scanF(register _Tp &tmp){
        register bool flag=false;
        register char ch=get_ch();
        tmp=0;
        while(!isdigit(ch)){
            flag|=ch=='-';
            ch=get_ch();
        }
        while(isdigit(ch)){
            tmp=(tmp<<3)+(tmp<<1)+(ch^48);
            ch=get_ch();
        }
        tmp=flag?-tmp:tmp;
    }
    template<typename _Tp>
    inline void print(register _Tp tmp) {
        static int sta[64];
        register int top=0;
        do{
            sta[top++]=tmp%10;
            tmp/=10;
        }while(tmp);
        while(top){
            push(sta[--top]+'0');
        }
        push(' ');
    }
}using namespace fastIO;
template<typename _Tp,typename... Args>
inline void scanF(register _Tp& num,register Args&... args){
    scanF(num);
    scanF(args...);
}
int main(){
    //...
    fwrite(write_buf,1,p-write_buf,stdout);
    return 0;
}