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

namespace Sakktáblatorta
{
    class Program
    {
        static void Main(string[] args)
        {
            int[] in1 = Console.ReadLine().Split().Select(int.Parse).ToArray();
            int N = in1[0], M = in1[1];
            int min = (N > M) ? M : N;
            int x = min * 2 + 1;
            Console.WriteLine(Math.Floor(Math.Sqrt(x)));
            Console.Read();
        }
    }
}