import java.util.Scanner;

public class Main {

    public static void main(String[] args) {

        Scanner in = new Scanner(System.in);

        int N = Integer.parseInt(in.nextLine());

        double highestSnowballValue = -1;
        double highestSnowballSnow = 0;
        double highestSnowballTime = 0;
        double highestSnowballQuality = 0;

        for (int i = 0; i < N; i++) {

            double snowballSnow = Integer.parseInt(in.nextLine());
            double snowballTime = Integer.parseInt(in.nextLine());
            double snowballQuality = Integer.parseInt(in.nextLine());

            double snowballValue = Math.pow((snowballSnow / snowballTime), snowballQuality);

            if (snowballValue > highestSnowballValue) {

                highestSnowballValue = snowballValue;
                highestSnowballSnow = snowballSnow;
                highestSnowballTime = snowballTime;
                highestSnowballQuality = snowballQuality;

            }
        }

        if ((highestSnowballValue - Math.floor(highestSnowballValue)) > 0) {
            System.out.printf("%d : %d = %.2f (%d)%n",
                    (int) highestSnowballSnow,
                    (int) highestSnowballTime,
                    highestSnowballValue,
                    (int) highestSnowballQuality);
        } else {
            System.out.printf("%d : %d = %d (%d)%n",
                    (int) highestSnowballSnow,
                    (int) highestSnowballTime,
                    (int) highestSnowballValue,
                    (int) highestSnowballQuality);
        }
    }
}