Approved

All good to go, just #include <string> in both the sample and submission tests per the guidelines. Although <fmt/core.h> definitely includes <string>, ignore these transitive relations and explicitly list everything you need anyway

Approved

Excellent stylistically and pretty much approve worthy, but I have two questions:

1. Unless I'm missing something, wouldn't long or long long get the input domain a bit closer to some of the other translations?
2. 500 random tests seems a bit excessive to me

Bloated premise imo.

C++ Translation

Was already approved by someone

To anyone experiencing this, console.log your values instead and you'll probably figure out the quirk that's causing the comparison to fail

Approved

You are so full of yourself. You are in no position to tell people what they should and should not be proud of.

Linq is the worst thing a beginner coder could ever learn.

And who told you that OP, or anyone in this thread as a matter of fact, was a beginner? Everybody knows what 2.5x faster means. You didn't need to recite the entire hare and tortoise song-and-dance like you're talking to preschoolers. People know when they're being patronized, so have some tact.

Since you're so intent on quoting things, want me to leave off with something?

Premature optimization is the root of all evil.

If LINQ is not a bottleneck, it is not a bottleneck. You are Dunning-Kruger personified.

The timeout issues you've experienced are because your algorithm is slow (most solutions finish in <= 1sec), otherwise yes I agree that the description could be more explicit about the desired shape of the cartesian products.

C++ Translation.

if you're talking about mine, not really. it doesn't spoil the task but i spoilered it on the side of caution since it mentions a library name