pointer to tell what type of sequence are we dealing with
type = - 1 ; NEW_LINE while ( n != 0 ) : NEW_LINE INDENT if ( type == - 1 ) : NEW_LINE INDENT if ( prev == - 1 ) : NEW_LINE INDENT prev = n % 10 ; NEW_LINE n = int ( n / 10 ) ; NEW_LINE continue ; NEW_LINE DEDENT DEDENT DEDENT