using System;

namespace yukicoder
{
    class Program
    {
        static void Main(string[] args)
        {
            //K%コピー完了
            float K = int.Parse(Console.ReadLine());
            //何分掛かるか
            float S = int.Parse(Console.ReadLine());

            float a = 0;
            float b = 0;
            //小数点以下切り捨て
            float c = 0;
            a = K / 100;
            b = S / a;
            if(b%2!=0)
            {
                //b += 1;
                c = b % 2;
                b -= c;
            }
            Console.WriteLine(b);
        }
    }
}