Which parts need attention first
The morning report lists every part sitting below its minimum, worst first, so the buyer knows where to start.
- A part is short when what is on hand is strictly below its minimum.
- Order by shortfall, largest first.
- Parts equally short are listed by code, A to Z.
LowStock(parts: list<Sku>) → list<string>
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 List<string> LowStock(List<Sku> parts) {
}Worked examples
| Call | Result |
|---|---|
LowStock(new List<Sku> { new Sku("B-2", 4, 10), new Sku("A-1", 20, 10), new Sku("C-3", 0, 30) }) | new List<string> { "C-3", "B-2" } |
LowStock(new List<Sku> { new Sku("Z-9", 5, 10), new Sku("A-4", 1, 6) }) | new List<string> { "A-4", "Z-9" } |
LowStock(new List<Sku> { new Sku("A-1", 10, 10) }) | new List<string> { } |
LowStock(new List<Sku> { }) | new List<string> { } |
Hint
Filter, then sort with a comparator that falls back to the code when the shortfalls match.
Reference solution in C#
public List<string> LowStock(List<Sku> parts) {
var shortList = parts.Where(p => p.OnHand < p.MinLevel).ToList();
shortList.Sort((a, b) => {
int d = (b.MinLevel - b.OnHand) - (a.MinLevel - a.OnHand);
return d != 0 ? d : string.CompareOrdinal(a.Code, b.Code);
});
return shortList.Select(p => p.Code).ToList();
}