ARC15_C

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

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

            double[,] rate = new double[401,401];
            var dict = new Dictionary<string, int>();

            string[] smp = new string[401];

            for (int i = 0; i < n; i++)
            {
                string[] par = Console.ReadLine().Split(' ').ToArray();
                int j = int.Parse(par[1]);
                string s1 = par[0];
                string s2 = par[2];

                if (!dict.ContainsKey(s1))
                {
                    dict[s1] = dict.Count;
                    smp[dict[s1]] = s1;
                }
                if (!dict.ContainsKey(s2))
                {
                    dict[s2] = dict.Count;
                    smp[dict[s2]] = s2;
                }

                rate[dict[s2], dict[s1]] = j;
                rate[dict[s1], dict[s2]] = 1D/j;
            }

            n = dict.Count;

            for (int k = 0; k < 2; k++)
            {
                for (int l = 0; l < n; l++)
                    for (int m = 0; m < n; m++)
                        for (int q = 0; q < n; q++)
                        {
                            if (rate[m, q] == 0D && rate[m, l] > 0 && rate[l, q] > 0) rate[m, q] = rate[m, l] * rate[l, q];
                            if (rate[m, q] == 0D && rate[m, l] > 0 && rate[q, l] > 0) rate[m, q] = rate[m, l] / rate[q, l];
                        }
            }
            double rr = 0;
            string st = "", en = "";
            for (int x = 0; x < n; x++)
            {
                for (int y = 0; y < n; y++)
                {
                    if (rr < rate[x, y])
                    {
                        rr = rate[x, y];
                        st = smp[y];
                        en = smp[x];
                    }
                }
            }

            Console.WriteLine("1{0}={1}{2}", st, (long)(rr+0.001), en);
        }
    }
}