还有
#include<cstdio>
main(){printf("5");}


```cpp
#include<iostream> 
using namespace std;
int main(){
    cout<<5;
}
```


#include <cstdio>
using namespace std;
int main(){printf("5");}

亲，这边可以不用长整数，毕竟有计算器谁用这玩意儿算呀

#include<bits/stdc++.h>
int main(){short a, b;std::cin>>a>>b;std::cout<<a + b;return 0;}

#include <iostream>

int main() {
    short int a, b;
    std::cin >> a >> b;
    std::cout << a + b << '\n';
    return 0;
}

你可以用头文件<cstdio>然后用scanf和printf减少时间

#include <iostream>
using namespace std;

int main() {
    long long a, b;
    cin >> a >> b;
    cout << a+b << endl;
    return 0;
}

A+B problem

还能再减少内存吗

#include <iostream>
using namespace std;

int main() {
long long a, b;
cin >> a >> b;
cout << a+b << endl;
return 0;
}