Predkość średnia

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Probelm29
{
    class Program
    {
        static void Main(string[] args)
        {
            int t = int.Parse(Console.ReadLine());
            for (int i = 0; i < t; i++)
            {
                string[] tab = Console.ReadLine().Split(' ');
                int a = int.Parse(tab[0]);
                int b = int.Parse(tab[1]);
                if(a < b)
                {
                    int tmp = a;
                    a = b;
                    b = tmp;
                }
                int s = 2 * a;
                float T = 1 + (float)a / (float)b;
                Console.WriteLine(Math.Round(s/T));
            }
        }
    }
}