2235. Add Two Integers Given two integers num1 and num2, return the sum of the two integers. Example: Input: num1 = 12, num2 = 5 Output: 17 Explanatio: num1 is 12, num2 is 5, and their sum is 12 + 5 = 17, so 17 is returned. Constraints: -100<= num1, num2 <= 100 Solution: Code 2544. Alternating Digit Sum You are given a positive integer n. Each digit of n has a sign according to the following rules: The most significant digit is assigned a positive sign. Each other digit has an opposite sign to its adjacent digits. Return the sum all digits with their corresponding sign. Example 1: Input: n = 521 Output: 4 Explanation: (+5) + (-2) + (+1) = 4 Example 2: Input: n = 111 Output: 1 Explanation: (+1) + (-1) + (+1) = 1. Constraints: 1<= n <= 10⁹ Solution: Code