Code RoomDistinct substrings
MediumPrep Room Coding #1175

Distinct substrings

CodingAlgorithms & data structuresMid–Senior~28 min

Given a string s, return the number of distinct non-empty substrings of s. Two substrings are the same if they are equal as strings (positions don't matter). 1 <= len(s) <= 1000, lowercase letters. Example: 'aba' has substrings a, b, ab, ba, aba = 5 distinct.

Implement
count_distinct_substrings(s: str) → int
Examples
in["aba"]out5
What 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 28 min
InputExpectedGot
["aba"]5not run yetsample