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: Accepted)

/*********************************************
* 20.05.11 AtCoder Beginner Contest 157. A, B, C
* 
*
*********************************************/
/*********************************************
::test input::
*********************************************/

namespace TempName{
    using System;
    using System.Linq;
    using System.Collections.Generic;
    using System.Reflection;
    using static System.Console;
    using static IOmacro.CSharpInput; 
    using static IOmacro.CppInput;
    using static IOmacro.CConst;

    public class CRun{
        public readonly char problem_num = 'C';
        
        public void solve_1() {
            // A - Poor 
            // 3개의 수 중에서 2개가 같고, 나머지가 다른 경우
            
            int a = cin, b = cin, c = cin;
            string ans = "No";
            
            if (a == b) if (a != c) ans = "Yes";
            if (a == c) if (a != b) ans = "Yes";
            if (b == c) if (a != b) ans = "Yes";
            
            WriteLine(ans);
            
        }

        public void solve_2() {
            // B - Papers, Please 
            // 조건 판단
            // 정수 집합 중, 짝수인 것은 모두 3 또는 5로 나눠떨어진다.
            
            int qry_num = _int;
            int[] list = _inta;
            
            string ans = "APPROVED";
            
            for(int i = 0; i < qry_num; i++) {
                if ((list[i] & 1) == 0) {
                    if (list[i] % 3 == 0 || list[i] % 5 == 0) {
                        continue;
                    }
                    else {
                        ans = "DENIED";
                        break;
                    }
                }
            }
            
            WriteLine(ans);
        }

        public void solve_3() {
            // C - Poll 
            // N개의 투표용지, 각각 Si 문자열
            // 쓰여진 횟수가 가장 많은 문자열 출력
            // 복수인 경우 사전순
            
            int qry_num = _int;
            var dict = new Dictionary<string, int>();
            int ans_max = 0;
            for (int i = 0; i < qry_num; i++) {
                var input = _string;
                if (dict.ContainsKey(input)) {
                    dict[input] += 1;
                }
                else {
                    dict[input] = 1;
                }
                ans_max = Math.Max(ans_max, dict[input]);
            }
            
            var ans = new List<String>();
            foreach (var ix in dict) {
                if (ix.Value == ans_max) {
                    ans.Add(ix.Key);
                }
            }
            ans.Sort(StringComparer.Ordinal);
            foreach (var ix in ans) WriteLine(ix);
        }
        
        public void solve_4() {
            
        }
        
        public void solve_5() {
            
        }
        
        public void solve_6() {
            
        }
    }
    
    class Program { 
        static void Main() { 
            var run = new CRun();
            if (run.problem_num == 'A') run.solve_1(); 
            if (run.problem_num == 'B') run.solve_2(); 
            if (run.problem_num == 'C') run.solve_3();
            if (run.problem_num == 'D') run.solve_4();
            if (run.problem_num == 'E') run.solve_5();
            if (run.problem_num == 'F') run.solve_6();
        } 
    }
}

namespace IOmacro {
    //20.05.10. 수정
    
    using System; 
    using System.Linq; 
    using System.IO;
    using System.Collections.Generic;
    
    public class CSharpInput {
        public static StreamWriter _writer = new StreamWriter(Console.OpenStandardOutput());
        public const char separator = ' ';
        public static string _string{get{return Console.ReadLine();}}
        public static string[] _stringa{get{return (Console.ReadLine().Split(separator));}}
        public static int _int{get{return int.Parse(Console.ReadLine());}}
        public static int[] _inta{get{return Console.ReadLine().Split(separator).Select(int.Parse).ToArray();}}
        public static long _long{get{return long.Parse(Console.ReadLine());}}
        public static long[] _longa{get{return Console.ReadLine().Split(separator).Select(long.Parse).ToArray();}}    
        public static double _double{get{return double.Parse(Console.ReadLine());}}
        public static double[] _doublea{get{return Console.ReadLine().Split(separator).Select(double.Parse).ToArray();}}    
    }
    
    public class CConst {
        public static readonly int MINI = int.MaxValue;
        public static readonly long INF = Int64.MaxValue;
    }
    
    public class CppInput {
        public static CppInput cin => new CppInput();
        public const char separator = ' ';
        private static readonly Queue<string> _input = new Queue<string>();
        private CppInput(){}
        public static implicit operator string(CppInput _) {
            if (_input.Count == 0) Console.ReadLine().Split(separator).foreachExtension(x => _input.Enqueue(x));
            return _input.Dequeue();
        }
        public static implicit operator int(CppInput _){
            if (_input.Count == 0) Console.ReadLine().Split(separator).foreachExtension(x => _input.Enqueue(x));
            return int.Parse(_input.Dequeue());
        }
        public static implicit operator long(CppInput _){
            if (_input.Count == 0) Console.ReadLine().Split(separator).foreachExtension(x => _input.Enqueue(x));
            return long.Parse(_input.Dequeue());
        }
        public static implicit operator double(CppInput _){
            if (_input.Count == 0) Console.ReadLine().Split(separator).foreachExtension(x => _input.Enqueue(x));
            return double.Parse(_input.Dequeue());
        }
    }
    
    public static class EnumerableExtension {
        public delegate void Function<in T>(T val);
        public static void foreachExtension<T>(this IEnumerable<T> enumerable, Function<T> function) {
            foreach (var x in enumerable) function(x);
        }
    }
}