Скачать или смотреть LeetCode 3583 | Count Special Triplets | Optimal Prefix + Hashing Intuition

Solve LeetCode 3583 – Count Special Triplets with the clearest intuition and most optimal approach!
This problem asks us to count all triplets (i, j, k) that satisfy a special mathematical condition based on prefix sums and differences.

In this video, you will learn:
🔹 Why brute force O(n³) and O(n²) fail
🔹 The hidden pattern behind the triplet condition
🔹 How prefix sums + hashing reduce the problem to O(n)
🔹 How to track required values using frequency maps
🔹 A complete dry run to make the logic crystal clear

This is a frequent contest-level problem that teaches powerful concepts used in advanced DSA and competitive programming.

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