Valeo Algorithm Engineer interview questions

I've spent a decent time solving problems at leetcode but what I found is that I was asked only in Geometry and basic concepts about programming! they also expect you to have C++ as your main language not your preferred one. So if you're a ninja in coding and not strong in geometry or math, this is not for you (or If you don't code in C++ of course)

2 geometry questions How to know the u ique numbers in array in nlogn