Anyone have insight how to solve this problem?\nhttps://www.hackerearth.com/challenges/competitive/pycon-2020/algorithm/jumbo-and-array-1-69b5c314-2b740e3b/\nI got TLE and I suspect I need closed-form (O(1)) solution for the summation.\n\n![image](https://assets.leetcode.com/users/images/f27f4ce8-3d0e-4175-af16-46b68f767942_1633538720.135389.png)\n![image](https://assets.leetcode.com/users/images/4677a514-10e0-4ec8-a0c8-aaf683828e95_1633538719.624125.png)\n![image](https://assets.leetcode.com/users/images/ebcbf4c5-71ae-4b3a-a3b4-df819e0f4749_1633538723.6734786.png)

Anyone have insight how to solve this problem?\nhttps://www.hackerearth.com/challenges/competitive/pycon-2020/algorithm/jumbo-and-array-1-69b5c314-2b740e3b/\nI 