test maximilians intelligence in csharp in csharp

To test Maximilian's intelligence in C#, one approach could be to create a series of algorithmic puzzles or challenges that progressively increase in difficulty. These challenges could be designed to test various aspects of his problem-solving skills, such as logic, critical thinking, mathematics, and spatial reasoning.

Here is an example of a simple puzzle that could be used to test Maximilian's logical reasoning skills in C#:

// Puzzle: Given a list of integers, return the sum of all numbers that appear more than once in the list.

public static int FindDuplicateNumberSum(int[] list)
{
    int sum = 0;
    
    Dictionary<int, int> frequencyMap = new Dictionary<int, int>();
    
    foreach(int num in list)
    {
        if(frequencyMap.ContainsKey(num))
        {
            frequencyMap[num]++;
        }
        else
        {
            frequencyMap[num] = 1;
        }
    }
    
    foreach(KeyValuePair<int, int> pair in frequencyMap)
    {
        if(pair.Value > 1)
        {
            sum += pair.Key * pair.Value;
        }
    }
    
    return sum;
}
648 chars
31 lines

The above puzzle requires Maximilian to analyze the problem, identify the relevant characteristics of the input, and develop a strategy to compute the required output. By providing Maximilian with a series of puzzles like this, you can evaluate his ability to apply data structures, algorithms, and programming constructs in a real-world context.