Items Sort

Problem Overview

• Core task: Sort an integer array by ascending frequency, then by value.
• Input/Output: items[n] (ints); return int[n] sorted; n up to 2e5, values up to 1e6.
• Context: Frequency-based ordering in data processing or analytics.
• Company: This interview question is from Akuna interviews.
• Keywords: coding interview problem focusing on sorting and counts.