using System;

namespace _651
{
    class Program
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());
            DateTime ret = new DateTime(1,1,1,10,0,0);
            TimeSpan drive = new TimeSpan(0,n * 60 / 100,0);
            ret += drive;
            Console.Write(ret.Hour + ":");
            Console.WriteLine((ret.Minute < 10 ? "0" : "") + ret.Minute);
        }
    }
}