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contents/algorithms/interval.md
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@ -12,16 +12,20 @@ An example interval array: `[[1, 2], [4, 7]]`.
Interval questions can be tricky to those who have not tried them before because of the sheer number of cases to consider when they overlap.
## Corner cases
- Single interval
- Non-overlapping intervals
- An interval totally consumed within another interval
- Duplicate intervals
## Things to look out for during interviews
- Do clarify with the interviewer whether `[1, 2]` and `[2, 3]` are considered overlapping intervals as it affects how you will write your equality checks.
- Clarify with the interviewer whether `[1, 2]` and `[2, 3]` are considered overlapping intervals as it affects how you will write your equality checks.
- Clarify whether an interval of `[a, b]` will strictly follow `a` < `b` (`a` is smaller than `b`)
## Corner cases
- No intervals
- Single interval
- Two intervals
- Non-overlapping intervals
- An interval totally consumed within another interval
- Duplicate intervals (exactly the same start and end)
- Intervals which start right where another interval ends - `[[1, 2], [2, 3]]`
## Techniques