DIY: Range Sum Query 2D — Immutable
Understand how to solve the 2D range sum query problem by implementing a NumMatrix class in Rust. Learn to calculate the sum of elements within a specified sub-rectangle of a matrix using efficient methods. This lesson guides you through handling multiple queries on a fixed matrix, preparing you for similar coding interview problems.
We'll cover the following...
We'll cover the following...
Problem statement
Given an m * n matrix, you need to handle multiple queries of the following type:
Calculate the sum of the elements of the matrix inside the rectangle defined by its upper left corner, ...