using System;
using System.Numerics;
namespace SnowBalls
{
    class Program
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());
            BigInteger highestSnowballValue ;
            BigInteger currentSnowBallValue ;
            int highestSnowBallSnow = 0;
            int highestSnowBallTime = 0;
            int highestSnowBallQuality = 0;
            for (int i = 0; i < n; i++)
            {
                int snowballSnow = int.Parse(Console.ReadLine());
                int snowballTime = int.Parse(Console.ReadLine());
                int snowballQuality = int.Parse(Console.ReadLine());


                if (snowballQuality == 0)
                {
                    currentSnowBallValue = snowballSnow / snowballTime;
                }
                else
                {
                    currentSnowBallValue = snowballSnow / snowballTime;
                    BigInteger gradationNumber = currentSnowBallValue;
                    for (int j = 1; j < snowballQuality; j++)
                    {
                        currentSnowBallValue *= gradationNumber;
                    }
                }

                if(currentSnowBallValue > highestSnowballValue)
                {
                    highestSnowballValue = currentSnowBallValue;
                    highestSnowBallSnow = snowballSnow;
                    highestSnowBallTime = snowballTime;
                    highestSnowBallQuality = snowballQuality;
                }

            }

            Console.WriteLine($"{highestSnowBallSnow} : {highestSnowBallTime} = {highestSnowballValue} ({highestSnowBallQuality})");
        }
    }
}