Range Sum Query 2D - Immutable, is a LeetCode problem from Array subdomain. In this post we will see how we can solve this challenge in Swift

Problem Description

You can find the full details of the problem Range Sum Query 2D - Immutable at LeetCode

Solution

Time Complexity: O(mn) for init(), O(1) for sumRegion(), Space Complexity: O(mn)

Please check the main.swift snippet for the solution.

This solution originally posted at: Github by @soapyigu