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

namespace 洛谷
{
    class Program
    {
        static void Main(string[] args)
        {
            string[] input = Console.ReadLine().Split(' ');
            int x = int.Parse(input[0]), n = int.Parse(input[1]);
            int sum = 0;
            for (int i = 0; i < n; i++)
            {
                if (x != 6 && x != 7)
                {
                    sum += 250;
                }
                x++;
                if (x > 7)
                {
                    x = 7 - x;
                }
            }
            Console.WriteLine(sum);
            Console.ReadKey();
        }       
    }
}