Optimization

#pragma GCC diagnostic error "-std=c++11"
#pragma GCC optimize("-fdelete-null-pointer-checks,inline-functions-called-once,-funsafe-loop-optimizations,-fexpensive-optimizations,-foptimize-sibling-calls,-ftree-switch-conversion,-finline-small-functions,inline-small-functions,-frerun-cse-after-loop,-fhoist-adjacent-loads,-findirect-inlining,-freorder-functions,no-stack-protector,-fpartial-inlining,-fsched-interblock,-fcse-follow-jumps,-fcse-skip-blocks,-falign-functions,-fstrict-overflow,-fstrict-aliasing,-fschedule-insns2,-ftree-tail-merge,inline-functions,-fschedule-insns,-freorder-blocks,-fwhole-program,-funroll-loops,-fthread-jumps,-fcrossjumping,-fcaller-saves,-fdevirtualize,-falign-labels,-falign-loops,-falign-jumps,unroll-loops,-fsched-spec,-ffast-math,Ofast,inline,-fgcse,-fgcse-lm,-fipa-sra,-ftree-pre,-ftree-vrp,-fpeephole2",3)
#pragma GCC target("avx","sse2")
#include<cstdio>
using namespace std;
namespace FASTIO{
    const int MAXN=10000000;
    char gc(){
        static char In[MAXN],*at=In,*en=In;
        if(at==en)en=(at=In)+fread(In,1,MAXN,stdin);
        return at==en?EOF:*at++;
    }
    template<class tp>
    void read(tp& x){
        x=0;
        char c=gc();
        bool sgn=0;
        while((c<'0'||c>'9')&&c!='-'&&c!=EOF)c=gc();
        if(c==EOF)return;
        if(c=='-')sgn=1,c=gc();
        while(c>='0'&&c<='9')x=(x<<3)+(x<<1)+c-'0',c=gc();
        if(sgn)x=-x;
    }
    void read(char* str){
        char c=gc();
        while((c==' '||c=='\n'||c=='\r'||c=='\t')&&c!=EOF)c=gc();
        if(c!=EOF)while(c!=' '&&c!='\n'&&c!='\r'&&c!='\t')*str++=c,c=gc();
        *str=0;
    }
    char _In[MAXN],*_at=_In;
    void pc(char c){
        if(_at==_In+MAXN)fwrite(_at=_In,1,MAXN,stdout);
        *_at++=c;
    }
    template<typename tp>
    void write(tp x){
        if(x<0)pc('-'),write(-x);
        else{
            if(x>=10)write(x/10);
            pc(x%10+'0');
        }
    }
    void flush(){fwrite(_In,1,_at-_In,stdout),_at=_In;}
}using FASTIO::gc;using FASTIO::pc;using FASTIO::read;using FASTIO::write;using FASTIO::flush;

int main(){
    freopen("1.txt","r",stdin);
    freopen("2.txt","w",stdout);
    int a,b;
    read(a),read(b);
        write(a+b);
        flush();
    return 0;
}