Total minutes the line was down
A shift log stores each stop as a block of start and end minutes. Sum the length of every block to get total downtime.
- A block contributes its end minus start.
- Block never overlap and every end is after its start.
DowntimeTotal(blocks: list<Block>) → int
C# 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
public int DowntimeTotal(List<Block> blocks) {
}Worked examples
| Call | Result |
|---|---|
DowntimeTotal(new List<Block> { new Block(0, 60), new Block(120, 200) }) | 140 |
DowntimeTotal(new List<Block> { new Block(0, 30) }) | 30 |
DowntimeTotal(new List<Block> { }) | 0 |
DowntimeTotal(new List<Block> { new Block(5, 10), new Block(20, 25), new Block(100, 130) }) | 40 |
Hint
Add up (end - start) across every block.
Reference solution in C#
public int DowntimeTotal(List<Block> blocks) {
int total = 0;
foreach (var b in blocks) total += b.End - b.Start;
return total;
}