using CategoryGroup = System.Collections.Generic.Dictionary<Category, int>;

enum Category {
    Positive,
    Negative,
    Zero
}

class Result
{

    /*
     * Complete the 'plusMinus' function below.
     *
     * The function accepts INTEGER_ARRAY arr as parameter.
     */

    public static void plusMinus(List<int> arr)
    {
        
        
        var total = arr.Count();
        CategoryGroup counts = new CategoryGroup
        {
            { Category.Positive, 0 },
            { Category.Negative, 0 },
            { Category.Zero, 0 },
        };
        
        
        arr.ForEach(n => {
           if(n > 0) counts[Category.Positive]++;
           else if(n<0) counts[Category.Negative]++;
           else counts[Category.Zero]++;
        });
        
        printCounts(counts, total);
    }
    
    private static void printCounts(CategoryGroup counts, int total)
        => counts.Keys.ToList().ForEach(key 
            => Console.WriteLine(
                    calcFraction(counts[key], total)
                )
            );
    private static string calcFraction(int countOf, int total) => 
        ((double) countOf / total).ToString("F6");

}