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 Complib.Generic;
using CompLib.Util;
using System;
using System.Linq;
using System.Text;

public class Program
{

    public void Solve()
    {
        var sc = new Scanner();
        int n = sc.NextInt();
        var hm = new HashMap<string, int>();

        for (int i = 0; i < n; i++)
        {
            hm[sc.Next()]++;
        }

        int max = -1;
        var ar = hm.ToArray();
        Array.Sort(ar, (a, b) => a.Key.CompareTo(b.Key));
        foreach (var p in ar)
        {
            max = Math.Max(max, p.Value);
        }
        var sb = new StringBuilder();

        foreach (var p in ar)
        {
            if (p.Value == max)
            {
                sb.AppendLine(p.Key);
            }
        }
        Console.Write(sb.ToString());
    }

    public static void Main(string[] args) => new Program().Solve();
}


namespace Complib.Generic
{
    using System.Collections.Generic;
    class HashMap<K, V> : Dictionary<K, V>
    {
        public V this[K key]
        {
            set { base[key] = value; }
            get
            {
                V o;
                return TryGetValue(key, out o) ? o : base[key] = default(V);
            }
        }
    }
}

namespace CompLib.Util
{
    using System;
    using System.Linq;
    class Scanner
    {
        private int _index;
        private string[] _line;
        const char separator = ' ';

        public Scanner()
        {
            _index = 0;
            _line = new string[0];
        }

        public string Next()
        {
            while (_index >= _line.Length)
            {
                _line = Console.ReadLine().Split(separator);
                _index = 0;
            }
            return _line[_index++];
        }
        public int NextInt() => int.Parse(Next());
        public long NextLong() => long.Parse(Next());
        public double NextDouble() => double.Parse(Next());
        public char NextChar() => Next()[0];
        public char[] NextCharArray() => Next().ToCharArray();

        public string[] Array()
        {
            _line = Console.ReadLine().Split(separator);
            _index = _line.Length;
            return _line;
        }
        public int[] IntArray() => Array().Select(int.Parse).ToArray();
        public long[] LongArray() => Array().Select(long.Parse).ToArray();
        public double[] DoubleArray() => Array().Select(double.Parse).ToArray();
    }
}