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  2. 2 Additional Online Test (If Required)
  3. 3 Office Interview with Hiring Manager
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  5. 5 Paid Test Task and Follow-Up Interview
  6. 6 Iterative Paid Test Tasks
  7. 7 Office Verification
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Problems > Merged Interval Count > Editorial

Merged Interval Count — Solution & Editorial

Back to the Problem

Sort by start; sweep keeping the current block's end. A new block starts when the next interval begins strictly after it.

Complexity: O(N log N)

Watch out: Touching intervals ([1,2] and [2,3]) merge — use a > end, not a ≥ end, to start a new block.