Fast read Fast write O3 optimization

template:

code:

#include<bits/stdc++.h>
#pragma GCC optimize(3) //O3优化 

using namespace std;


inline int read(){//快读 
    int x=0,f=1;char ch=getchar();
    while(!isdigit(ch)){if(ch=='-')f=-1;ch=getchar();}
    while(isdigit(ch)){x=(x<<1)+(x<<3)+(ch^48);ch=getchar();}
    return x*f;
}
inline void write(int x){//快写 
     char F[200];
     int tmp=x>0?x:-x ;
     if(x<0)putchar('-') ;
     int cnt=0 ;
        while(tmp>0)
        {
            F[cnt++]=tmp%10+'0';
            tmp/=10;
        }
        while(cnt>0)putchar(F[--cnt]) ;
}
int main()
{

    return 0;
}

 Of course, in NOIP race (now called CSP) are not allowed to use O3 optimization