TCS NQT Coding Series | 07 Maximum Aqua Curtains in a Box | Approach + Step-by-Step Explanation

Описание: Welcome to the 7th problem of our TCS NQT Coding Series! In this video, we solve a unique string-based problem inspired by real curtain packaging in furnishing companies, known as Maximum Aqua Curtains in a Box.

In this scenario, curtains come in two colors: aqua (a) and black (b). They are packed into boxes, and your task is to find which box contains the maximum number of aqua curtains!

✔ Real-World Example
A company packs curtains in boxes containing fixed numbers. If the leftover curtains don’t fill a box fully, they still go into another box and must be counted too!

🎯 In this video, you’ll learn:
• How to split a string into substrings based on box size
• How to count character frequency inside each box
• Real-time logic building for placements
• Best approach to track maximum counts
• Dry run with clear step-by-step explanation
• Placement-focused coding tricks

📌 Problem Statement

You are given:

A string str of length N containing only letters a (aqua) and b (black).
A number L representing how many curtains are packed in each box.
Your task is to divide the string into boxes of size L, count the number of aqua curtains (a) in each box, and print the maximum count among them.

🔍 Important Note
If L does not perfectly divide the length N, the remaining characters also form a box and must be included.

✔ Example
Input:
bbbaaababa → string
3 → L

Output:
3

📌 Explanation:
Splitting into groups of size 3:

Box Curtains Count of 'a'
1 b b b 0
2 a a a 3
3 b a b 1
4 a 1

The second box has the most aqua curtains, i.e., 3.
👉 Hence, the output is 3.

🧠 Concepts Covered
• String traversal
• Substring grouping
• Frequency calculation
• Identifying maximum occurrences
• Decision-making questions for interviews

📺 Watch till the end to:
• Strengthen string-based logical thinking
• Learn competitive coding techniques
• Prepare effectively for TCS NQT Coding 2025 🚀

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