Range Sum Query 2D - Immutable Archives - Coddicted

Range Sum Query 2D – Immutable

Title: Range Sum Query 2D – Immutable Source: leetcode.com Given a 2D matrix matrix, find the sum of the elements inside the rectangle defined by its upper left corner (row1, col1) and lower right corner (row2, col2). The above rectangle (with the red border) is defined by (row1, col1) = (2, 1) and (row2, col2) ...