Solution 2 for Scaler Topics Fortnightly Contest - 15

This article is part of the Scaler Topics Fortnightly Contest - 15

Build an AI-First Career, Master the Complete Skillset

Choose from our industry-leading programs designed for career success

NSDC Certified

Modern Software and AI Engineering Program

Master full-stack development with AI integration

12 MonthsDuration

AI-LedCurriculum

Career SupportSupport

+1000 more

Go to Program

NSDC Certified

Modern Data Science and ML with specialisation in AI

Advanced data science techniques with AI specialization

12 MonthsDuration

AI-LedCurriculum

Career SupportSupport

+1000 more

Go to Program

NSDC Certified

Advanced AIML with Specialisation in Agentic AI

Deep dive into AIML with focus on Agentic systems

12 MonthsDuration

AI-LedCurriculum

Career SupportSupport

+1000 more

Go to Program

NSDC Certified

DevOps, Cloud & AI Platform Engineering

Build and manage AI-powered cloud infrastructure

12 MonthsDuration

AI-LedCurriculum

Career SupportSupport

+1000 more

Go to Program

NSDC Certified

AI Engineering Advanced Certification by IIT-Roorkee

Premier AI engineering certification from IIT-Roorkee

3 MonthsDuration

AI-LedCurriculum

Career SupportSupport

Go to Program

NSDC Certified

AI Forward Deployed Engineer Program

Full-stack engineering, production AI and client-facing consulting

12 MonthsDuration

AI-LedCurriculum

Career SupportSupport

+1000 more

Go to Program

Solution Approach

• We can solve this problem by maintaining one container that also stores duplicate values.
• for the first query, we will add the value to the container
• for the second query, we will remove that value from the container if that is present in that container
• for the third query, we will check all the values in the given container, and each value will either satisfy B or C
• at the end, we will take the absolute count of B and C to get the result

Time Complexity - O(N) Space Complexity - O(N)

C++ Implementation

Java Implementation

Hiring Partners:

GoogleAmazonMicrosoftFlipkartAdobe1200+ more

Python Implementation