Merge overlapping intervals in C#
C# interview exercise on Collections & LINQ, difficulty 3 of 3. Solve it in the editor beside a worked example, or cold in Interview mode with the example hidden; the tests run the moment you do.
Write MergeIntervals(intervals) that merges every overlapping or touching (Start, End) tuple and returns them sorted by Start. Do not change the input list.
Each exercise pairs a worked example with a twin problem to solve in a real editor; the tests run the moment you do. Interview mode hides the example: solve it from memory, without the hint or the solution, and it counts as solved cold. Progress is saved in your browser, and in your account if you sign in.