class SumOfOddNumbers {
       static final int NUMBER_OF_ODDS = 5 ;

       static int sumOdds( int anOddNumber ) {
            if ( anOddNumber <= 1 ) {
                return 1 ; }
           else {
            return anOddNumber + sumOdds( anOddNumber - 2 ) ;
          }
      }

     public static void main( String [ ] args ) {
           System.out.println( sumOdds(2 * NUMBER_OF_ODDS -1) ) ;
    }
}