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

namespace p_02
{
    class Program
    {
        static void Main(string[] args)
        {
            ulong totalPic = ulong.Parse(Console.ReadLine());
            ulong filterTime = ulong.Parse(Console.ReadLine());
            ulong filterFactorInPercent = ulong.Parse(Console.ReadLine());
            ulong uploadTime = ulong.Parse(Console.ReadLine());

            ulong usefulPic = (ulong)Math.Ceiling((filterFactorInPercent / 100.0) * totalPic);
            ulong secondsTotalPic = totalPic * filterTime;
            ulong secondsFilterPic = usefulPic * uploadTime;
            ulong totalSec = secondsFilterPic + secondsTotalPic;

            DateTime time = new DateTime();
            time = time.AddSeconds(totalSec);
            Console.WriteLine($"{time.Day - 1:D1}:{time.Hour:D2}:{time.Minute:D2}:{time.Second:D2}");
        }
    }
}