using System;

public class Program

{

    public static void Main()

    {

          while(true){

        Console.Write("Enter the total number of calories (-1 to end): ");

        int totalCalories = Convert.ToInt32(Console.ReadLine());

        if(totalCalories == -1){

            break;

        }

        Console.Write("Enter the number of fat grams: ");

        int numberOfFatGrams = Convert.ToInt32(Console.ReadLine());

        int caloriesFromFat = numberOfFatGrams * 9;

        if(totalCalories <= 0 || numberOfFatGrams <= 0 || caloriesFromFat >= totalCalories){

            Console.WriteLine("Invalid input either the calories or fat grams were incorrectly entered.");

            continue;//

        }

        int percentageOfCaloriesFromFat = (caloriesFromFat*100)/totalCalories;

        string determineFatCategory = "";

        if(percentageOfCaloriesFromFat > 40){

            determineFatCategory = "high fat";

        }

        else if(percentageOfCaloriesFromFat >= 30){

            determineFatCategory = "normal fat";

        }

        else{

            determineFatCategory = "low fat";

        }

        Console.WriteLine("Percentage of calories from fat: "+percentageOfCaloriesFromFat+"% (" + determineFatCategory + ")");

    }

    }

}