The Trade Signal

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

Domain

Python

Difficulty

easy

Seniority

L4

Problem

Given a list of prices, find the max gain of a single buy-then-sell window. Return a 3-element list [gain, buy_day_index, sell_day_index]. If no profit is possible (gain <= 0), return [0, 0, 0]. Among multiple windows tied for max gain, return the one with the earliest buy index then earliest sell index.

Summary

Buy low, sell high. Identify the ideal moment.

Practice This Problem

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