2 hours tech interview with 2 different engineers. In fact, they asked almost the same questions again and again. I can feel that they are young engineers and don't know how to cooperate with candidates. It's like they just follow a paper to read the question and wait for your answers. They want to show off their tech skills. My understanding is that nobody can know everything, you can't judge people based on several questions. This is not a happy interview experience. Although the algorithm problem is weird because of the weird data structure used, it took me a while to understand this problem. I don't like this company.