#include <iostream>
#include <string>
#include <iomanip>

using namespace std;


int main(int argc, char** argv)
{
	int integer;
	int piece;
	string roman;
	cout << "Arabic to Roman numeral conversion." << endl;
	cout << "Input the integer to convert." << endl;
	cin >> integer;
	if (integer < 1000 || integer > 3000)
	{
		cout << integer << " is Out of Range!";
	}
	else
	{
		if(integer >= 1000)
		{
			piece = (integer / 1000);
			for (int i = 0; i < piece; i++)
			{
				roman += 'M';
			}
		}
		integer %= 1000;
	}
	if (integer >= 100)
	{
		piece = (integer / 100);
	}
	if (piece == 9)
	{
		roman += 'CM';
	}
	else if (piece >= 5)
	{
		roman += 'D';
		for (int i = 0; i < piece - 5; i++)
		{
			roman += 'C';
		}
	}
	else if (piece == 4)
	{
		roman += 'CD';
	}
	else if (piece >= 1)
	{
		for (int i = 0; i < piece - 5; i++)
		{
			roman += "C";
		}
		integer %= 100;
	}
	if (integer >= 10)
	{
		piece = (integer / 10);
	}
	if (piece == 9)
	{
		roman += 'XC';
	}
	else if (piece >= 5)
	{
		roman += 'L';
		for (int i = 0; i < piece - 5; i++)
		{
			roman += 'X';
		}
	}
	else if (piece == 4)
	{
		roman += 'XL';
	}
	else if (piece >= 1)
	{
		for (int i = 0; i < piece; i++)
		{
			roman += 'X';
		}
		integer %= 10;
	}
	if (integer >= 1)
	{
		piece = integer;
		if (piece == 9)
		{
			roman += 'IX';
		}
		else if (piece >= 5)
		{
			roman += 'V';
			for (int i = 0; i < piece - 5; i++)
			{
				roman += 'I';
			}
		}
		else if (piece == 4)
		{
			roman += 'IV';
		}

		else if (piece >= 1)
		{
			for (int i = 0; i < piece; i++)
			{
				roman += 'I';
			}
		}
	}

	cout << integer << " is equal to " << roman;
	return 0;
}