Code snippet test

C++

newbie

#include <bits/stdc++.h>
using namespace std;
signed main() {
    cout << "hello world!" << endl;
    return 0;
}

Python

newbie

print ("hello world!")

Javascript

expert

console.log("hello world!")

Formula test

$$\overrightarrow{AB} \times \overrightarrow{BC} \neq 0$$