Integer

Problem You are working at an accounting firm and need to combine financial reports from two different departments, let’s say Marketing and Sales. These reports are provided to you in electronic format as linked lists of numbers. Each node in the linked list represents one digit of a larger number. The digits are arranged in reverse order because this is how they were stored in their original databases. Your task is to create a combined financial report by adding the numbers from both departmental reports. This requires you to traverse both linked lists, starting from the head (leftmost) node and moving towards the tail (rightmost). As you add the digits of each position, you also need to carry over any value resulting from the addition that is greater than 9 (i.e., tens place). This new carried-over value will become the next digit in the combined number. ...

Problem You work for a financial services company that handles transactions involving 32-bit signed integer amounts. Your goal is to enhance security by implementing an additional check: reverse the digits of a given transaction amount to create a new reference code. If reversing the digits results in a value outside the valid range of transaction amounts, which lies between -2,147,483,648 and 2,147,483,647, then return a code indicating the operation is invalid. Otherwise, return the reversed amount as the reference code. Assume the environment does not allow you to store 64-bit integers (signed or unsigned). ...