using System;

namespace P10SnowBall
{
    class Program
    {
        static void Main(string[] args)
        {
            int numberSnowballsMade = int.Parse(Console.ReadLine());

            double snowBallTotal = 0;
            int ballSnow = 0;
            int ballTime = 0;
            int ballQuality = 0;
            int snowballBiggestQuality = 0;

            for (int i = 1; i <= numberSnowballsMade; i++)
            {
                int snowBallSnow = int.Parse(Console.ReadLine());
                int snowBallTime = int.Parse(Console.ReadLine());
                int snowBallQuality = int.Parse(Console.ReadLine());
                double snowBallValue = Math.Pow(snowBallSnow / snowBallTime, snowBallQuality);
                if (snowBallTotal < snowBallValue)
                {
                    snowBallTotal = snowBallValue;
                    ballSnow = snowBallSnow;
                    ballTime = snowBallTime;
                    ballQuality = snowBallQuality;
                }
            }

            Console.WriteLine($"{ballSnow} : {ballTime} = {snowBallTotal} ({ballQuality})");
        }
    }
}