Problem:
Score : 200 points

Problem Statement

Given are 1-digit positive integers a and b. Consider these two strings: the concatenation of b copies of the digit a, and the concatenation of a copies of the digit b. Which of these is lexicographically smaller?

Constraints

1 \leq a \leq 9

1 \leq b \leq 9

a and b are integers.

Input

Input is given from Standard Input in the following format:

a b

Output

Print the lexicographically smaller of the two strings. (If the two strings are equal, print one of them.)

Sample Input 1

4 3

Sample Output 1

3333

We have two strings 444 and 3333. Between them, 3333 is the lexicographically smaller.

Sample Input 2

7 7

Sample Output 2

7777777

Solution in C# (Mono 4.6.2.0) (judge verdict: Accepted)

namespace Test
{
    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;

    public class Test
    {
        public static void Main(string[] args)
        {
            var test = new Test();
            var n = test.ConvertIntArray(test.ReadInput());
            var list = new List<string>();

            var sb1 = new StringBuilder();
            for (var i = 0; i<n[1]; i++)
            {
                sb1.Append(n[0].ToString());
            }
            list.Add(sb1.ToString());

            var sb2 = new StringBuilder();
            for (var i = 0; i<n[0]; i++)
            {
                sb2.Append(n[1].ToString());
            }
            list.Add(sb2.ToString());
            list.Sort();
            Console.WriteLine(list[0]);

        }

        public string[] ReadInput()
        {
            return Console.ReadLine().Split(' ');
        }

        public int[] ConvertIntArray(string[] x)
        {
            var convertedArray = new int[x.Length];
            for (var i = 0; i < x.Length; i++)
            {
                convertedArray[i] = int.Parse(x[i]);
            }

            return convertedArray;
        }

        public double[] ConvertDoubleArray(string[] x)
        {
            var convertedArray = new double[x.Length];
            for (var i = 0; i < x.Length; i++)
            {
                convertedArray[i] = int.Parse(x[i]);
            }

            return convertedArray;
        }

        public long[] ConvertLongArray(string[] x)
        {
            var convertedArray = new long[x.Length];
            for (var i = 0; i < x.Length; i++)
            {
                convertedArray[i] = long.Parse(x[i]);
            }

            return convertedArray;
        }

        public int CountContainWords(string source, string word)
        {
            var count = 0;
            var loopCount = source.Length - (word.Length - 1);
            for (var i = 0; i < loopCount; i++)
            {
                if (source.Substring(i, word.Length) == word)
                {
                    count++;
                }
            }
            return count;
        }
    }
}