The Complement Hunt

A easy Python interview practice problem on DataDriven. Write and execute real python code with instant grading.

Domain

Python

Difficulty

easy

Seniority

mid, senior

Problem

Write a function that takes a list of integers and a target integer. Return the indices of the two numbers that sum to the target as a two-element list [i, j] where i < j. Assume exactly one valid solution exists.

Practice This Problem

Solve this Python problem with real code execution. DataDriven runs your Python code in a sandboxed Docker environment and grades it instantly.