static int countHexadecimal ( int L , int R ) {
  int count = 0 ;
  for ( int i = L ;
  i <= R ;
  i ++ ) {
    if ( i >= 10 && i <= 15 ) count ++ ;
    else if ( i > 15 ) {
      int k = i ;
      while ( k != 0 ) {
        if ( k % 16 >= 10 ) count ++ ;
        k = k / 16 ;
      }
    }
  }
  return count ;
}

static int countHexadecimal ( int L , int R ) { int count = 0 ; for ( int i = L ; i <= R ; i ++ ) { if ( i >= 10 && i <= 15 ) count ++ ; else if ( i > 15 ) { int k = i ; while ( k != 0 ) { if ( k % 16 >= 10 ) count ++ ; k = k / 16 ; } } } return count ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier)) (formal_parameter type: (integral_type) name: (identifier))) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (identifier))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (binary_expression left: (identifier) right: (decimal_integer_literal)))) consequence: (expression_statement (update_expression (identifier))) alternative: (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) consequence: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (identifier))) (while_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (decimal_integer_literal))) consequence: (expression_statement (update_expression (identifier)))) (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (decimal_integer_literal))))))))))) (return_statement (identifier))))