public class Program { public static void Main() { string inPut; int max = -1, min = -1; while ((inPut = System.Console.ReadLine()) != null) { string[] inPutNum = System.Console.ReadLine().Split(" ");

        max = min = int.Parse(inPutNum[0]);
        int num = int.Parse(inPut);
        for (int i = 0; i < num; i++) {
            //找出最大数
            if (max < int.Parse(inPutNum[i]))
                max = int.Parse(inPutNum[i]);
            //找出最小数
            if (min > int.Parse(inPutNum[i]))
                min = int.Parse(inPutNum[i]);
        }
    }
    System.Console.Write(max - min);
}

}