Kolbi

using System;
using System.Collections.Generic;
using System.Linq;

namespace Kolbi
{
    class Kolbi
    {
        static void Main(string[] args)
        {
            double[] input = Console.ReadLine().Split(new char[] { ' ' },StringSplitOptions.RemoveEmptyEntries).Select(double.Parse).ToArray();
            double numOfColbes = input[0];
            double volume = input[1];
            double[] volumes = new double[(int)numOfColbes + 1];
            volumes[0] = 0;
            volumes[1] = 1;

           if (volume > 1)
            {
                for (int i = 2; i <= numOfColbes; i++)
                {

                    volumes[i] = i - 1 + volumes[i - 1];
                    if (volume <= volumes[i])
                    {
                        if (i % 2 != 0)
                        {
                            Console.WriteLine(i);

                            break;
                        }
                    }

                }
            }
            else if (volume > 0 && volume <=1)
            {
                Console.WriteLine("3");
            }




        }
    }
}