Скачать или смотреть 1865. Finding Pairs With a Certain Sum | Leetcode | Python in Tamil | Soumil Speaks

➕ 1865. Finding Pairs With a Certain Sum | Leetcode | Python in Tamil 🇮🇳
In this Soumil Speaks video, we solve an awesome hashmap-based design problem — where we build a class that can add numbers and efficiently count how many pairs add up to a target sum.

This is a medium-level problem that's great for understanding hashmaps, data design, and how to handle frequency updates dynamically. A great pick for students preparing for product-based companies!

🎯 What you'll learn:

How to design a class with add and count methods

How to update frequencies efficiently

How to avoid overcounting in pair sums

Full step-by-step Python code explained in Tamil

Dry-run with edge cases and examples

📌 Language: Tamil
📌 Difficulty: Medium
📌 Leetcode Problem: 1865
📌 Ideal for: Students, system design beginners, and DSA learners

📢 Don’t forget to like, comment, and subscribe to Soumil Speaks for more DSA + placement prep in Tamil!

🧠 Quick Logic:

Store frequency of elements in nums2 using a hashmap

For every add(val), increase the frequency of val

For count(t), check how many values in nums1 can pair with values in nums2 to give sum t

Handle cases where both values in the pair are the same

📌 Hashtags:
#Leetcode1865 #FindPairsWithSum #SoumilSpeaks #PythonInTamil #DSATamil #HashmapProblem #PlacementPrep #LeetcodeMedium #CodingInTamil #DesignQuestion #TwoSumVariant