{ "id": 2304, "name": "cells_in_a_range_on_an_excel_sheet", "difficulty": "Easy", "link": "https://leetcode.com/problems/cells-in-a-range-on-an-excel-sheet/", "date": "1645920000000", "task_description": "A cell `(r, c)` of an excel sheet is represented as a string `\"