Count recent hires by department
An HR roster stores one employee per row as "name,dept,year" where year is the four-digit hire year. For a headcount report, count how many employees are in department `dept` AND were hired in year `since_year` or later. Example: rows ["ava,eng,2023", "raj,sales,2024", "mia,eng,2025"] with dept "eng" and since_year 2024 give 1.
Implement
count_hires(rows: list[str], dept: str, since_year: int) → intExamples
in
[["ava,eng,2023","raj,sales,2024","mia,eng,2025"],"eng",2024]out1What a strong answer looks like
State your approach and its time/space complexity out loud before you optimize. Handle the edge cases (empty input, duplicates, overflow), and say why you chose this over the brute force. Green tests are the floor, not the grade.
0:00 of about 10 min
solution.py
InputExpectedGot
[["ava,eng,2023","raj,sales,2024","mia,eng,2025"],"eng",2024]1not run yetsample