import java.util.Scanner;

public class techModuleSnowBalls {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);


        int n = Integer.parseInt(scanner.nextLine());
        double maxValue = Double.MIN_VALUE;
        int maxSnow = 0;
        int maxTime = 0;
        int maxQuality = 0;

        for (int i = 0; i < n; i++) {
            int snow = Integer.parseInt(scanner.nextLine());
            int time = Integer.parseInt(scanner.nextLine());
            int quality = Integer.parseInt(scanner.nextLine());

            double value = Math.pow(snow / time, quality);

            if (maxValue < value) {
                maxValue = value;
                maxSnow = snow;
                maxTime = time;
                maxQuality = quality;
            }


        }
        System.out.println(String.format("%d : %d = %.0f (%d)",maxSnow,maxTime,maxValue,maxQuality));

    }
}