Problem:
Score: 300 points

Problem Statement

We have N voting papers. The i-th vote (1 \leq i \leq N) has the string S_i written on it.

Print all strings that are written on the most number of votes, in lexicographical order.

Constraints

1 \leq N \leq 2 \times 10^5

S_i (1 \leq i \leq N) are strings consisting of lowercase English letters.

The length of S_i (1 \leq i \leq N) is between 1 and 10 (inclusive).

Input

Input is given from Standard Input in the following format:

N
S_1
:
S_N

Output

Print all strings in question in lexicographical order.

Sample Input 1

7
beat
vet
beet
bed
vet
bet
beet

Sample Output 1

beet
vet

beet and vet are written on two sheets each, while beat, bed, and bet are written on one vote each. Thus, we should print the strings beet and vet.

Sample Input 2

8
buffalo
buffalo
buffalo
buffalo
buffalo
buffalo
buffalo
buffalo

Sample Output 2

buffalo

Sample Input 3

7
bass
bass
kick
kick
bass
kick
kick

Sample Output 3

kick

Sample Input 4

4
ushi
tapu
nichia
kun

Sample Output 4

kun
nichia
tapu
ushi

Solution in C# (Mono 4.6.2.0) (judge verdict: Time Limit Exceeded)

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

namespace ConsoleApp2
{
    public class Program
    {

        static int D = (int)Math.Pow(10, 9) + 7;

        public static void Main(string[] args)
        {
            //int[] abc = Read(Console.ReadLine());
            Dictionary<string, int> d = new Dictionary<string, int>();

            int N = Read(Console.ReadLine())[0];
            string[] Ss = new string[N];

            int max = 0;
            for (int i = 0; i < N; i++)
            {
                Ss[i] = Console.ReadLine();
                if (d.ContainsKey(Ss[i])) d[Ss[i]]++;
                else d.Add(Ss[i], 1);
                if (d[Ss[i]] > max) max = d[Ss[i]];
            }

            d.OrderBy(s => s.Key);

            string[] ans = new string[N];
            int index = 0;
            foreach (var item in d)
            {
                if (item.Value == max)
                {
                    ans[index]=(item.Key);
                    index++;
                }
            }
            Array.Sort(ans);

            foreach (var item in ans)
            {
                Console.WriteLine(item);
            }

            Console.ReadLine();
        }



        static long Com(int n, int m)
        {
            if (m == 0 || m == n) return 1;

            if (n < m) return 0;

            int[] a = new int[m];

            for (int i = 0; i < m; i++)
            {
                a[i] = n - i;
            }
            for (int i = 1; i <= m; i++)
            {
                for (int j = 0; j < m; j++)
                {
                    if (a[j] % i == 0)
                    {
                        a[j] /= i;
                        break;
                    }
                }
            }

            long ans = 1;
            for (int i = 0; i < m; i++)
            {
                ans *= a[i];
                ans %= D;
            }
            return ans;
        }


        // 最小公倍数
        public static int Lcm(int a, int b)
        {
            return a * b / Gcd(a, b);
        }

        // ユークリッドの互除法 
        public static int Gcd(int a, int b)
        {
            if (a < b)
                // 引数を入替えて自分を呼び出す
                return Gcd(b, a);
            while (b != 0)
            {
                var remainder = a % b;
                a = b;
                b = remainder;
            }
            return a;
        }


        private static bool S(int[] data,int K ,int l ,int x)
        {
            int sum = 0;
            int max = Math.Min(x+1, data.Length);
            for (int i = l; i < max; i++)
            {
                sum += data[i];
            }
            Console.WriteLine(sum);
            return sum>=K;
        }

  





        private static string ReplaceOneChar(string S, int index, string newS)
        {
            string s1 = S.Substring(0, index - 1);
            string s2 = S.Substring(index);
            return s1 + newS + s2;
        }

        private static bool PartialSum(int target, int[] Ns)
        {
            //if (target == 0) return true;
            bool[][] ps = new bool[Ns.Length + 1][];

            //i=0では、どんなWに対してもfalse
            ps[0] = new bool[target+1];
            for (int i = 0; i < ps[0].Length; i++) ps[0][i] = false;

            ps[0][0] = true;


            //考慮に入れるitemを、前から順に追加していく
            for (int i = 0; i < Ns.Length; i++)
            {
                //初期化
                ps[i + 1] = new bool[target+1];

                for (int t = 0; t <= target; t++)
                {
                    if (t >= Ns[i]) ps[i + 1][t] = ps[i][t - Ns[i]] || ps[i][t];
                    else ps[i + 1][t]=ps[i][t];
                }
            }

            return ps[Ns.Length][target];
        }

        /// <summary>
        /// 引数は、W(重さ制限)、items[重さ][価値]
        /// </summary>
        /// <param name="W"></param>
        /// <param name="items"></param>
        /// <returns></returns>
        private static int DP(int W,int[][] items)
        {
            //データ
            int[][] dp = new int[items.Length+1][];

            //i=0では、どんなWに対しても0
            dp[0] = new int[W + 1];

            //考慮に入れるitemを、前から順に追加していく
            for (int i = 0; i < items.Length; i++)
            {
                //初期化
                dp[i+1] = new int[W + 1];

                for (int w = 0; w <= W; w++)
                {
                    if (w >= items[i][0]) dp[i + 1][w] = Math.Max(dp[i][w - items[i][0]]+items[i][1], dp[i][w]);
                    else dp[i + 1][w] = dp[i][w];
                }
            }
            return dp[items.Length][W];
        }

        private static int[] Read(string input)
        {
            string[] aaa = input.Split(' ');
            int num = aaa.Length;
            int[] ints = new int[num];
            for (int i = 0; i < num; i++)
            {
                ints[i] = int.Parse(aaa[i]);
            }
            
            return ints;
        }


    }


}