using System;
public class Program
{
public static void Main()
int x, y, z;
Console.WriteLine("nhap x:");
string s = Console.ReadLine();
x = int.Parse(s);
Console.WriteLine("nhap y: ");
string b = Console.ReadLine();
y = int.Parse(b);
z = x + y;
Console.WriteLine("tong z = {0}+{1}", x, y);
}