cin.sync_with_stdio(false);

Ignore the notes. G++ is faster than Clang++, while Visual C++ 2017 gives TL.

What do you mean? Speed of input?

The problem statement has a note: "If you write your solution in C++ we recommend you to use Visual C++ 2013 compiler." It is a bad advice, since the same program AC with G++ but TL with MS C++ (obviously, I have no idea what exactly makes it TL).

If you look through solution ratings of hardest problems, then you can see, that MS C++ is used more often then others (G++/clang++). Thus your experience is not representative.

Why hardest problems if we are talking about this one? Just look at "Solutions rating of problem Tourism on Mars": the first MS C++ is number 13, ten times slower than the top, which uses G++.

I agree, you're right.