using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static int NN => int.Parse(ReadLine());
    static long[] NList => ReadLine().Split().Select(long.Parse).ToArray();
    public static void Main()
    {
        Solve();
        // Test();
    }
    static void Test()
    {
        var r = new Random();
        var count = 0;
        var now = DateTime.Now;
        while (true)
        {
            var a = r.Next(1_000_000_000) + 1;
            var b = r.Next(1_000_000_000) + 1;
            var s = Problem(a, b);
            ++count;
            if (count == 200000) break;
        }
        WriteLine((DateTime.Now - now).TotalSeconds);
    }
    static void Solve()
    {
        var t = NN;
        var ans = new long[t];
        for (var u = 0; u < t; ++u)
        {
            var c = NList;
            var (a, b) = (c[0], c[1]);
            ans[u] = (long)Problem(a, b);
        }
        WriteLine(string.Join("\n", ans));
    }
    static decimal Problem(long a, long b)
    {
        // checked {
            var ok = ((decimal)Math.Sqrt(a) + (decimal)Math.Sqrt(b)) * 2;
            var ng = decimal.Zero;
            while (ok - ng > 1)
            {
                var mid = decimal.Floor((ok + ng) / 2);
                if ((mid * mid - a - b) * (mid * mid - a - b) > 4 * a * b) ok = mid;
                else ng = mid;
            }
            return ok;
        // }
    }
}