public static void main ( String [ ] args ) {
  FastReader fr = new FastReader ( ) ;
  Scanner sc = new Scanner ( System . in ) ;
  int a = fr . nextInt ( ) , b = fr . nextInt ( ) , ab = fr . nextInt ( ) ;
  long ans = ab * 2L ;
  if ( a == b ) ans += 2L * a ;
  else ans += Math . min ( a , b ) * 2L + 1L ;
  System . out . println ( ans ) ;
}

public static void main ( String [ ] args ) { FastReader fr = new FastReader ( ) ; Scanner sc = new Scanner ( System . in ) ; int a = fr . nextInt ( ) , b = fr . nextInt ( ) , ab = fr . nextInt ( ) ; long ans = ab * 2L ; if ( a == b ) ans += 2L * a ; else ans += Math . min ( a , b ) * 2L + 1L ; System . out . println ( ans ) ; }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (array_type element: (type_identifier) dimensions: (dimensions)) name: (identifier))) body: (block (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (type_identifier) arguments: (argument_list)))) (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))) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))) 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) value: (binary_expression left: (identifier) right: (decimal_integer_literal)))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) consequence: (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (decimal_integer_literal) right: (identifier)))) alternative: (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier) (identifier))) right: (decimal_integer_literal)) right: (decimal_integer_literal))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (identifier))))))