Scala solution with implicit and map
IntuitionApproachComplexity
Time complexity:

Space complexity:
Code
# Intuition
<!-- Describe your first thoughts on how to solve this problem. -->

# Approach
<!-- Describe your approach to solving the problem. -->

# Complexity
- Time complexity:
<!-- Add your time complexity here, e.g. $$O(n)$$ -->

- Space complexity:
<!-- Add your space complexity here, e.g. $$O(n)$$ -->

# Code
```scala []
object Solution {
    def isBalanced(num: String): Boolean = {
        num.toCharArray.zipWithIndex.map {
            case (value, idx) =>
                if (idx % 2 == 0) value.asNum else -value.asNum
        }.sum == 0
    }

    implicit class CharNum(c: Char) {
        def asNum: Int = c - '0'
    }
}
```
['Scala']