Process Transactions

Problem Preview

"The team at Amazon ElasticCache is developing on a new solution for frequent updates and computations of existing entries. There are size entry points where the i^{th} entry point is denoted by entries[i]. There are count different updates to be made to the entries where the i^{th} update is denoted by transaction[i][0] and transaction[i][1]. Each transaction consists of two integers denoted by transaction[i][0] and transaction[i][1]. For each i^{th} transaction, perform the following: - For all indices idx, where entries[idx] = transaction[i][0], s < count, 0 ≤ idx < size - Find the sum of all the integers in the array entries. - Persist the updates in the array. Given an integer array entries and a 2D integer array transaction, find the sum of all the entry points after processing each transaction."