public static void main ( String [ ] args ) throws IOException {
  BufferedReader br = new BufferedReader ( new InputStreamReader ( System . in ) ) ;
  String [ ] paras = br . readLine ( ) . split ( " " ) ;
  String [ ] nums = br . readLine ( ) . split ( " " ) ;
  int temp = Integer . parseInt ( paras [ 0 ] ) ;
  int num = Integer . parseInt ( paras [ 1 ] ) ;
  int result = 0 ;
  boolean mark = false ;
  for ( int i = 0 ;
  i < temp ;
  i ++ ) {
    if ( Integer . parseInt ( nums [ i ] ) < num ) {
      result ++ ;
    }
    if ( Integer . parseInt ( nums [ i ] ) == num ) {
      mark = true ;
    }
  }
  result = num - result ;
  result = mark ? result + 1 : result ;
  System . out . println ( result ) ;
}

public static void main ( String [ ] args ) throws IOException { BufferedReader br = new BufferedReader ( new InputStreamReader ( System . in ) ) ; String [ ] paras = br . readLine ( ) . split ( " ▁ " ) ; String [ ] nums = br . readLine ( ) . split ( " ▁ " ) ; int temp = Integer . parseInt ( paras [ 0 ] ) ; int num = Integer . parseInt ( paras [ 1 ] ) ; int result = 0 ; boolean mark = false ; for ( int i = 0 ; i < temp ; i ++ ) { if ( Integer . parseInt ( nums [ i ] ) < num ) { result ++ ; } if ( Integer . parseInt ( nums [ i ] ) == num ) { mark = true ; } } result = num - result ; result = mark ? result + 1 : result ; System . out . println ( result ) ; }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (array_type element: (type_identifier) dimensions: (dimensions)) name: (identifier))) (throws (type_identifier)) body: (block (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (type_identifier) arguments: (argument_list (object_creation_expression type: (type_identifier) arguments: (argument_list (field_access object: (identifier) field: (identifier)))))))) (local_variable_declaration type: (array_type element: (type_identifier) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) name: (identifier) arguments: (argument_list (string_literal))))) (local_variable_declaration type: (array_type element: (type_identifier) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) name: (identifier) arguments: (argument_list (string_literal))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (array_access array: (identifier) index: (decimal_integer_literal)))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (array_access array: (identifier) index: (decimal_integer_literal)))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (local_variable_declaration type: (boolean_type) declarator: (variable_declarator name: (identifier) value: (false))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (array_access array: (identifier) index: (identifier)))) right: (identifier))) consequence: (block (expression_statement (update_expression (identifier))))) (if_statement condition: (parenthesized_expression (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (array_access array: (identifier) index: (identifier)))) right: (identifier))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (true))))))) (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (identifier)))) (expression_statement (assignment_expression left: (identifier) right: (ternary_expression condition: (identifier) consequence: (binary_expression left: (identifier) right: (decimal_integer_literal)) alternative: (identifier)))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (identifier))))))