public static void main ( String [ ] args ) {
  Scanner read = new Scanner ( System . in ) ;
  int n , k , x , f , t = 0 , j ;
  n = read . nextInt ( ) ;
  k = read . nextInt ( ) ;
  x = read . nextInt ( ) ;
  for ( int i = 1 ;
  i <= n ;
  i ++ ) {
    f = read . nextInt ( ) ;
    if ( i <= n - k ) {
      t += f ;
    }
  }
  j = t + k * x ;
  System . out . println ( j ) ;
}

public static void main ( String [ ] args ) { Scanner read = new Scanner ( System . in ) ; int n , k , x , f , t = 0 , j ; n = read . nextInt ( ) ; k = read . nextInt ( ) ; x = read . nextInt ( ) ; for ( int i = 1 ; i <= n ; i ++ ) { f = read . nextInt ( ) ; if ( i <= n - k ) { t += f ; } } j = t + k * x ; System . out . println ( j ) ; }
(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 (field_access object: (identifier) field: (identifier)))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier)) declarator: (variable_declarator name: (identifier)) declarator: (variable_declarator name: (identifier)) declarator: (variable_declarator name: (identifier)) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal)) declarator: (variable_declarator name: (identifier))) (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) 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 (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (binary_expression left: (identifier) right: (identifier)))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (identifier))))))) (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (binary_expression left: (identifier) right: (identifier))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (identifier))))))