REST API: Country Codes
Palantir● EasyINTERNOAProblem statement
You are given a country name country, a phone-number string phoneNumber, and countryRecords, an offline representation of the country API data. Each row contains a country name followed by that record's calling codes in API order.
Find the row whose country name exactly equals country. If no row matches, return -1. Otherwise, use the row's last calling code and return +<calling code> <phone number>. Preserve phoneNumber exactly, including leading zeroes.
Function
getPhoneNumbers(country: String, phoneNumber: String, countryRecords: String[][]) → StringExamples
Example 1
country = "Afghanistan"phoneNumber = "6564454455"countryRecords = [["Afghanistan","93"]]return = "+93 6564454455"The supplied Afghanistan record has one calling code, 93, so the formatted result is +93 6564454455.
Example 2
country = "Puerto Rico"phoneNumber = "564539386"countryRecords = [["Puerto Rico","1787","1939"]]return = "+1939 564539386"The Puerto Rico record has calling codes [1787, 1939]. The last entry is 1939, so that code is used.
Example 3
country = "Oceania"phoneNumber = "987574876"countryRecords = [["Afghanistan","93"],["Puerto Rico","1787","1939"]]return = "-1"No supplied record has the exact country name Oceania, so the function returns -1.
Constraints
0 <= countryRecords.length <= 3002 <= countryRecords[i].length <= 10- Country names in
countryRecordsare unique. - Country names contain English letters and spaces.
- Calling codes and
phoneNumbercontain decimal digits.