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For C++ code, especially for Bronze through Gold, we should use (at most) the following template:

#include <bits/stdc++.h> // see /general/running-code-locally
using namespace std;

using ll = long long;

using vi = vector<int>;
#define pb push_back
#define all(x) begin(x), end(x)
#define sz(x) (int)(x).size()

using pi = pair<int,int>;
#define f first
#define s second
#def

https://github.com/DOMjudge/domjudge/blob/3f8c8b1f8d69c142ea90d34653c55a2c07d195c7/sql/files/examples/boolfind_cmp/run#L9

The above file and the manual from October 2017 mentioned the existence of a teammessage.txt feedback file that, presumably, would be shown to the team as submission feedback like judgemessage.txt is shown to the judges.

I have recently had cause to desire this functi

We should add a DMOJ_PROBLEM_STATEMENT_DISALLOWED_CHARACTERS = ('“', '”', '‘', '’') settings option, and validate (at least) problem statements to not contain any of the characters within it.

We've tried the social solution, but it's proven hard to enforce.

We sometimes want to run tests which are not associated to specific problems (e.g. generating inputs using srand() and rand(), and check the output with assert()). For this, we can use Hello World as a dummy problem.
However, this technique is not trivial, so we should print hint messages when test files with no PROBLEM