public static void main ( String args [ ] ) {
  Scanner sc = new Scanner ( System . in ) ;
  int r = sc . nextInt ( ) ;
  int g = sc . nextInt ( ) ;
  int b = sc . nextInt ( ) ;
  int ans = 0 ;
  int min = Math . min ( r , Math . min ( g , b ) ) ;
  ans += min ;
  ans += ( r - min ) / 3 ;
  ans += ( g - min ) / 3 ;
  ans += ( b - min ) / 3 ;
  int r1 = ( r - min ) % 3 ;
  int r2 = ( g - min ) % 3 ;
  int r3 = ( b - min ) % 3 ;
  boolean f1 = ( r1 == 2 ) ;
  boolean f2 = ( r2 == 2 ) ;
  boolean f3 = ( r3 == 2 ) ;
  if ( ( ( f1 && f2 ) || ( f2 && f3 ) || ( f1 && f3 ) ) && min > 0 ) {
    ans ++ ;
  }
  System . out . println ( ans ) ;
}

public static void main ( String args [ ] ) { Scanner sc = new Scanner ( System . in ) ; int r = sc . nextInt ( ) ; int g = sc . nextInt ( ) ; int b = sc . nextInt ( ) ; int ans = 0 ; int min = Math . min ( r , Math . min ( g , b ) ) ; ans += min ; ans += ( r - min ) / 3 ; ans += ( g - min ) / 3 ; ans += ( b - min ) / 3 ; int r1 = ( r - min ) % 3 ; int r2 = ( g - min ) % 3 ; int r3 = ( b - min ) % 3 ; boolean f1 = ( r1 == 2 ) ; boolean f2 = ( r2 == 2 ) ; boolean f3 = ( r3 == 2 ) ; if ( ( ( f1 && f2 ) || ( f2 && f3 ) || ( f1 && f3 ) ) && min > 0 ) { ans ++ ; } System . out . println ( ans ) ; }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (type_identifier) name: (identifier) dimensions: (dimensions))) 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) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (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) value: (decimal_integer_literal))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier) (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier) (identifier))))))) (expression_statement (assignment_expression left: (identifier) right: (identifier))) (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) right: (decimal_integer_literal)))) (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) right: (decimal_integer_literal)))) (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) right: (decimal_integer_literal)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) right: (decimal_integer_literal)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) right: (decimal_integer_literal)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) right: (decimal_integer_literal)))) (local_variable_declaration type: (boolean_type) declarator: (variable_declarator name: (identifier) value: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))))) (local_variable_declaration type: (boolean_type) declarator: (variable_declarator name: (identifier) value: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))))) (local_variable_declaration type: (boolean_type) declarator: (variable_declarator name: (identifier) value: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))))) (if_statement condition: (parenthesized_expression (binary_expression left: (parenthesized_expression (binary_expression left: (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) right: (parenthesized_expression (binary_expression left: (identifier) right: (identifier)))) right: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))))) right: (binary_expression left: (identifier) right: (decimal_integer_literal)))) consequence: (block (expression_statement (update_expression (identifier))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (identifier))))))