Which zone price applies
A carrier prices by zone. Look up the per-kilogram rate for a zone; a zone with no entry means it is not served.
- Rates are per kilogram, in minor units.
- A zone that is not in the table is unsupported: return 0.
zoneRate(zoneRates: map<string, int>, zone: string) → int
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
int zoneRate(Map<String, Integer> zoneRates, String zone) {
}Worked examples
| Call | Result |
|---|---|
zoneRate(Main.<String, Integer>mp("a", 120, "b", 180, "c", 250), "a") | 120 |
zoneRate(Main.<String, Integer>mp("a", 120, "b", 180), "c") | 0 |
zoneRate(Main.<String, Integer>mp(), "a") | 0 |
zoneRate(Main.<String, Integer>mp("x", 0), "x") | 0 |
Hint
Map lookup, then a default.
Reference solution in Java
int zoneRate(Map<String, Integer> zoneRates, String zone) {
Integer r = zoneRates.get(zone);
return r == null ? 0 : r;
}