题目描述:
Given a 2D matrix, find the sum of the elements inside the rectangle defined by (row1, col1), (row2, col2).
The above rectangle (with the red border) is defined by (row1, col1) = (2, 1) and (row2, col2) = (4 ...
Given a 2D matrix, find the sum of the elements inside the rectangle defined by (row1, col1), (row2, col2).
The above rectangle (with the red border) is defined by (row1, col1) = (2, 1) and (row2, col2) = (4 ...
Given an integer array nums, find the sum of the elements between indices i and j (i ≤ j), inclusive.
Example:
Given nums = [-2, 0, 3, -5, 2, -1] sumRange(0, 2) -> 1 sumRange(2, 5) -> -1 ...