Problem:
English Sentence

Your task is to write a program which reads a text and prints two words. The first one is the word which is arise most frequently in the text. The second one is the word which has the maximum number of letters.

The text includes only alphabetical characters and spaces. A word is a sequence of letters which is separated by the spaces.

Input

A text is given in a line. You can assume the following conditions:

The number of letters in the text is less than or equal to 1000.

The number of letters in a word is less than or equal to 32.

There is only one word which is arise most frequently in given text.

There is only one word which has the maximum number of letters in given text.

Output

The two words separated by a space.

Sample Input

Thank you for your mail and your lectures

Output for the Sample Input

your lectures

Solution in C# (judge verdict: Accepted)

using System;
using System.Collections.Generic;
using System.Linq;
class Program
{
    public static bool f = false, t = true;
    static void Main(string[] args)
    {
        string[] n = Console.ReadLine().Split();
        Dictionary<string, int> a = new Dictionary<string, int> { };
        for (int i = 0;i< n.Length; i++)
        {
            if (!a.ContainsKey(n[i].ToLower()))
            {
                a.Add(n[i].ToLower(), 1);
            }
            else { a[n[i].ToLower()]++; }
        }
        Console.WriteLine( a.OrderBy(p => p.Value).Last().Key+" "+ a.OrderBy(p => p.Key.Length).Last().Key);


   //     Console.WriteLine();
    }
    public static long gcd(long a, long b)
    {
        while (true)
        {
            if (a == 0) { return b; }
            if (b == 0) { return a; }
            if (a > b) { a -= b; }
            else { b -= a; }
        }
    }
    public static long lcm(long a, long b) { return a / gcd(a, b) * b; }
    public static string Reverse(string s)
    {
        return new string(s.Reverse().ToArray());
    }
    public static bool IsPrime(int num)
    {
        if (num < 2) return false;
        else if (num == 2) return true;
        else if (num % 2 == 0) return false; // 偶数はあらかじめ除く

        double sqrtNum = Math.Sqrt(num);
        for (int i = 3; i <= sqrtNum; i += 2)
        {
            if (num % i == 0)
            {
                // 素数ではない
                return false;
            }
        }

        // 素数である
        return true;
    }
}
public static class Read
{
    public static void outl(string n = "") { Console.WriteLine(n); return; }
    public static long Long() { return long.Parse(Console.ReadLine()); }
    public static long[] longs() { return Console.ReadLine().Split().Select(long.Parse).ToArray(); }
    public static int Int() { return int.Parse(Console.ReadLine()); }
    public static int[] ints() { return Console.ReadLine().Split().Select(int.Parse).ToArray(); }
    public static string Str() { return Console.ReadLine(); }
    public static string[] Strs() { return Console.ReadLine().Split(); }
}