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