public static void main ( String [ ] args ) throws Exception {
  Scanner in = new Scanner ( System . in ) ;
  int t = in . nextInt ( ) ;
  int n ;
  while ( t != 0 ) {
    n = in . nextInt ( ) ;
    Set < Integer > s = new TreeSet < > ( ) ;
    for ( int i = 0 ;
    i < n ;
    i ++ ) {
      int a = in . nextInt ( ) ;
      if ( s . contains ( a ) ) s . add ( a + 1 ) ;
      else s . add ( a ) ;
    }
    System . out . println ( s . size ( ) ) ;
    t -- ;
  }
}

public static void main ( String [ ] args ) throws Exception { Scanner in = new Scanner ( System . in ) ; int t = in . nextInt ( ) ; int n ; while ( t != 0 ) { n = in . nextInt ( ) ; Set < Integer > s = new TreeSet < > ( ) ; for ( int i = 0 ; i < n ; i ++ ) { int a = in . nextInt ( ) ; if ( s . contains ( a ) ) s . add ( a + 1 ) ; else s . add ( a ) ; } System . out . println ( s . size ( ) ) ; t -- ; } }
(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 (field_access object: (identifier) field: (identifier)))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier))) (while_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) body: (block (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (generic_type (type_identifier) (type_arguments (type_identifier))) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (generic_type (type_identifier) (type_arguments)) arguments: (argument_list)))) (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 (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (if_statement condition: (parenthesized_expression (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier)))) consequence: (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (decimal_integer_literal))))) alternative: (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))))) (expression_statement (update_expression (identifier)))))))