using System using System Collections Generic using System Linq using

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

namespace ConsoleApplication2 {
    class Program {
        static void Main(string[] args) {
            BigInteger answer = new BigInteger(1);
            for (BigInteger i = 2; i <= 106; ++i) {
                answer *= i;
            }
            Console.WriteLine(answer / 360);
        }
    }
}