Dart Solution For Beginners
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
```dart []
class Solution {
  int sumOfGoodNumbers(List<int> nums, int k) {
    int sum = 0;
    for (int i = 0; i < nums.length; i++) {
      bool isGood = true;
      if (i - k >= 0 && nums[i] <= nums[i - k]) {
        isGood = false;
      }
      if (i + k < nums.length && nums[i] <= nums[i + k]) {
        isGood = false;
      }
      if (isGood) {
        sum += nums[i];
      }
    }
    
    return sum;
  }
}
```
['Array', 'Dart']