using static System.Math;
using System;

public class Hello
{
    static void Main()
    {
        var T = int.Parse(Console.ReadLine().Trim());
        while (T-- > 0)
        {

            string[] line = Console.ReadLine().Trim().Split(' ');
            var a = long.Parse(line[0]);
            var b = long.Parse(line[1]);
            getAns(a, b);
        }
    }
    static bool check(long a, long b, long t)
    {
        var w = t * t - a - b;
        return 4 * a * b < w * w;
    }
    static void getAns(long a, long b)
    {
        var ok = (long)Sqrt(a) + (long)Sqrt(b) + 10;
        var ng = (long)Sqrt(a) + (long)Sqrt(b) - 1;
        while (ok - ng > 1)
        {
            var mid = ng + (ok - ng) / 2L;
            if (check(a, b, mid)) ok = mid;
            else ng = mid;
        }
        Console.WriteLine(ok);
    }
}