Do these two bookings clash
A meeting room calendar refuses a booking that runs into another one. Times are minutes since midnight.
- An interval runs from its start up to but not including its end, so two bookings that merely touch do not clash.
- An interval whose end is not after its start is empty and clashes with nothing.
intervalsOverlap(aStart: int, aEnd: int, bStart: int, bEnd: int) → bool
Java needs a compiler and Drill does not host one yet, so this page is the reference rather than an exercise: the problem, worked examples, and the solution in full. To type it out, the same problem runs in Python.
Where you start
boolean intervalsOverlap(int aStart, int aEnd, int bStart, int bEnd) {
}Worked examples
| Call | Result |
|---|---|
intervalsOverlap(60, 120, 110, 180) | true |
intervalsOverlap(60, 120, 120, 180) | false |
intervalsOverlap(60, 120, 0, 30) | false |
intervalsOverlap(60, 120, 70, 80) | true |
Hint
Two intervals overlap when each one starts before the other ends. Deal with the empty case first.
Reference solution in Java
boolean intervalsOverlap(int aStart, int aEnd, int bStart, int bEnd) {
if (aEnd <= aStart || bEnd <= bStart) return false;
return aStart < bEnd && bStart < aEnd;
}