SumSeconds-rado84

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

namespace SummingSeconds
{
    class Program
    {
        static void Main(string[] args)
        {
            int racer1 = int.Parse(Console.ReadLine());
            int racer2 = int.Parse(Console.ReadLine());
            int racer3 = int.Parse(Console.ReadLine());
            int TotalSeconds = racer1 + racer2 + racer3;

            int seconds = TotalSeconds % 60;
            int minutes = TotalSeconds / 60;

            Console.WriteLine(minutes.ToString("0.##") + ":" + seconds.ToString("00.##"));

        }
    }
}