text: //This Programme Converts a given decimal number in the range [0,4000)  
  //to both Lower case and Upper case Roman Numeral
  
  #include <cmath>
  #include <cstdio>
  #include <string>
  #include <iostream>
  using namespace std;
  
  //This functions fills a string with character c, n times and returns it
  
  string fill( char c, int n )
  {
      string s;
      while( n-- ) s += c;
      return s;
  }
  
  //to convert to lowercase Roman Numeral
  
  string tolowerRoman( int n )
  {
      if( n < 4 ) return fill( 'i', n );
      if( n < 6 ) return fill( 'i', 5 - n ) + "v";
      if( n < 9 ) return string( "v" ) + fill( 'i', n - 5 );
      if( n < 11 ) return fill( 'i', 10 - n ) + "x";
      if( n < 40 ) return fill( 'x', n / 10 ) + tolowerRoman( n % 10 );
      if( n < 60 ) return fill( 'x', 5 - n / 10 ) + 'l' + tolowerRoman( n % 10 );
      if( n < 90 ) return string( "l" ) + fill( 'x', n / 10 - 5 ) + tolowerRoman( n % 10 );
      if( n < 110 ) return fill( 'x', 10 - n / 10 ) + "c" + tolowerRoman( n % 10 );
      if( n < 400 ) return fill( 'c', n / 100 ) + tolowerRoman( n % 100 );
      if( n < 600 ) return fill( 'c', 5 - n / 100 ) + 'd' + tolowerRoman( n % 100 );
      if( n < 900 ) return string( "d" ) + fill( 'c', n / 100 - 5 ) + tolowerRoman( n % 100 );
      if( n < 1100 ) return fill( 'c', 10 - n / 100 ) + "m" + tolowerRoman( n % 100 );
      if( n < 4000 ) return fill( 'm', n / 1000 ) + tolowerRoman( n % 1000 );
      return "?";
  }
  
  //to convert to uppercase Roman Numeral
  
  string toupperRoman( int n )
  {
      if( n < 4 ) return fill( 'I', n );
      if( n < 6 ) return fill( 'I', 5 - n ) + "V";
      if( n < 9 ) return string( "V" ) + fill( 'I', n - 5 );
      if( n < 11 ) return fill( 'I', 10 - n ) + "X";
      if( n < 40 ) return fill( 'X', n / 10 ) + toupperRoman( n % 10 );
      if( n < 60 ) return fill( 'X', 5 - n / 10 ) + 'L' + toupperRoman( n % 10 );
      if( n < 90 ) return string( "L" ) + fill( 'X', n / 10 - 5 ) + toupperRoman( n % 10 );
      if( n < 110 ) return fill( 'X', 10 - n / 10 ) + "C" + toupperRoman( n % 10 );
      if( n < 400 ) return fill( 'C', n / 100 ) + toupperRoman( n % 100 );
      if( n < 600 ) return fill( 'C', 5 - n / 100 ) + 'D' + toupperRoman( n % 100 );
      if( n < 900 ) return string( "D" ) + fill( 'C', n / 100 - 5 ) + toupperRoman( n % 100 );
      if( n < 1100 ) return fill( 'C', 10 - n / 100 ) + "M" + toupperRoman( n % 100 );
      if( n < 4000 ) return fill( 'M', n / 1000 ) + toupperRoman( n % 1000 );
      return "?";
  }
  
  //main function
  
  int main()
  {
  
  int n;
  cin >> n;
  cout << n << " in Upper Roman Numerals is " << toupperRoman(n)  << "\n";
  cout << n << " in Lower Roman Numerals is " << tolowerRoman(n) << "\n";
  return 0;
  }
  