using System;

using namespace std;

public class Program

{

    public struct TinhTamGiac

    {

        public DIEM A.X;

        public DIEM A.Y;

        public DIEM A.Z;

    }

    class XL_TAMGIAC

    {

        DIEM A.X;

        Console.WriteLine("Nhap A.X:");

        A.X=int.Parse(Console.ReadLine());

        DIEM A.Y;

        Console.WriteLine("Nhap A.Y:");

        A.Y=int.Parse(Console.ReadLinre());

        DIEM A.Z;

        Console.WriteLing("Nhap A.Z:");

        A.Z=int.Parse(Console.ReadLine());

        return A;

    }

    public static float TAMGIAC(DIEM A.X, DIEM A.Y, DIEM A.Z)

    {

        return Math.Sqrt(A.X+A.Y+A.Z);

    }

}