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();
    }
    static void Solve()
    {
        var t = NN;
        var ans = new ulong[t];
        for (var u = 0; u < t; ++u)
        {
            var c = NList;
            var (a, b) = (c[0], c[1]);
            ans[u] = Problem((ulong)a, (ulong)b);
        }
        WriteLine(string.Join("\n", ans));
    }
    static ulong Problem(ulong a, ulong b)
    {
        checked {
            var ok = (ulong)((Math.Sqrt(a) + Math.Sqrt(b)) * 1.1 + 1);
            var ng = (ulong)0;
            while (ok - ng > 1)
            {
                var mid = (ok + ng) / 2;
                if (mid * mid < a + b) ng = mid;
                else if ((mid * mid - a - b) * (mid * mid - a - b) > 4 * a * b) ok = mid;
                else ng = mid;
            }
            return ok;
        }
    }
}