Determining if two intervals overlap is not a trivia question but a trivial question for a programmer and hiring people who can't do better than O(n²) probably

Determining if two intervals overlap is not a trivia question but a trivial question for a programmer and hiring people who can't do better than O(n²) probably is good only for really boring maintenance projects where the workload lags far behind Moore's law. I'm not necessarily saying that such things don't exist, but not my cup of tea.