Trapping Rainwater Problem – Brute Force and Optimized Two-Pointer Approach Explained

Автор: RisingBrain

Загружено: 2026-02-23

Просмотров: 1836

Описание: In this video, I have explained the Trapping Rainwater problem step by step, starting from the brute force approach and then moving to the optimized two pointer solution.

First, we understand the intuition behind the problem and how water gets trapped between bars. Then we solve it using the brute force method and analyze its time complexity. After that, we optimize the solution using the two pointer approach to reduce the time and space complexity.

In this video you will learn:

How to think about left max and right max

Why brute force works but is inefficient

How to optimize the solution

How two pointers help in solving it in linear time

Important pattern for coding interviews

This is a very important problem for coding interviews and helps you understand array patterns deeply.

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Rising Brain (DSA Sheet) - https://www.risingbrain.org/sheet

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Trapping Rainwater Problem – Brute Force and Optimized Two-Pointer Approach Explained

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