#便民小题解🚀️ #不知道对不对，各位观众老爷测试一下👀️

#inculde<bits/stdc++.h>
using namespace std;
int main(){
    freopen("plus.in","r",stdin);
    freopen("plus.in","r",stdin);
    long long a,b;
    cin>>a>>b;
    cout<a+b;
}

默念$freopen$的语法，别的没得说

不开long long见祖宗！

#inculde<bits/stdc++.h>
using namespace std;
int main(){
    freopen("plus.in","r",stdin);
    freopen("plus.in","r",stdin);
    long long a,b;
    cin>>a>>b;
    cout<<a+b;
}

就很简单

#include<bits/stdc++.h>
using namespace std;

int  main(){
    freopen("plus.in","r",stdin);
    freopen("plus.out","w",stdout);
    long long a,b;
    cin>>a>>b;
    cout<<a+b;
    return 0;
}

但一不小心就re了

#include <bits/stdc++.h>
#include <iostream>
#include <iomanip>
#include <ios>
#include <iosfwd>
#include <istream>
#include <ostream>
#include <cstring>
#include <cstdio>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include <ctype.h>
#include <errno.h>
#include <float.h>
#include <limits.h>
#include <locale.h>
#include <math.h>
#include <stdlib.h>
#include <time.h>
#include <wchar.h>
#include <wctype.h>
#include <complex.h>
#include <fenv.h>
#include <inttypes.h>
#include <stdbool.h>
#include <stdint.h>
#include <tgmath.h>
#include <vector>
#include <algorithm>
#include <cmath>
#include <algorithm>
#include <bitset>
#include <cctype>
#include <cerrno>
#include <clocale>
#include <cmath>
#include <complex>
#include <cstdlib>
#include <ctime>
#include <deque>
#include <exception>
#include <fstream>
#include <functional>
#include <limits>
#include <list>
#include <map>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <stdexcept>
#include <streambuf>
#include <string>
#include <utility>
#include <vector>
#include <cwchar>
#include <cwctype>
using namespace std;
int  main(){
    freopen("plus.in","r",stdin);
    freopen("plus.out","w",stdout);
    long long a,b;
    cin>>a>>b;
    cout<<a+b;
    return 0;
}