2544. Alternating Digit Sum

Easy

10 Points

Math

You are given a positive integer n. Each digit of n has a sign according to the following rules: Return the sum of all digits with their corresponding sign.

Examples

Example 1

Input: n = 521 Output: 4 Explanation: (+5) + (-2) + (+1) = 4.

Example 2

Input: n = 111 Output: 1 Explanation: (+1) + (-1) + (+1) = 1.

Example 3

Input: n = 886996 Output: 0 Explanation: (+8) + (-8) + (+6) + (-9) + (+9) + (-6) = 0.

Constraints

1 <= n <= 109