GGitLab·DSAEngineerTechnical Phone Screen
Two Sum / Hash Map Fundamentals
Problem
Return indices of two numbers summing to a target.
Example
[2,7,11,15], 9 -> [0,1]
Constraints
- 2 ≤ n ≤ 10^4
Approach
Hash map, O(n). Live discussion focuses on clarity and trade-offs.
added 6 days ago