public static void main ( String [ ] args ) {
  Scanner in = new Scanner ( System . in ) ;
  int n , sum = 0 , minsum = Integer . MAX_VALUE , man = 0 ;
  int [ ] a = new int [ 101 ] ;
  n = in . nextInt ( ) ;
  for ( int i = 1 ;
  i <= n ;
  i ++ ) {
    a [ i ] = in . nextInt ( ) ;
  }
  for ( int x = 1 ;
  x <= n ;
  x ++ ) {
    sum = 0 ;
    for ( int i = 1 ;
    i <= n ;
    i ++ ) {
      man = 0 ;
      man += 2 * ( Math . abs ( i - x ) + Math . abs ( i - 1 ) + Math . abs ( 1 - x ) ) ;
      sum += man * a [ i ] ;
    }
    if ( sum < minsum ) {
      minsum = sum ;
    }
  }
  System . out . println ( minsum ) ;
  in . close ( ) ;
}

public static void main ( String [ ] args ) { Scanner in = new Scanner ( System . in ) ; int n , sum = 0 , minsum = Integer . MAX_VALUE , man = 0 ; int [ ] a = new int [ 101 ] ; n = in . nextInt ( ) ; for ( int i = 1 ; i <= n ; i ++ ) { a [ i ] = in . nextInt ( ) ; } for ( int x = 1 ; x <= n ; x ++ ) { sum = 0 ; for ( int i = 1 ; i <= n ; i ++ ) { man = 0 ; man += 2 * ( Math . abs ( i - x ) + Math . abs ( i - 1 ) + Math . abs ( 1 - x ) ) ; sum += man * a [ i ] ; } if ( sum < minsum ) { minsum = sum ; } } System . out . println ( minsum ) ; in . close ( ) ; }
(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) value: (decimal_integer_literal)) declarator: (variable_declarator name: (identifier) value: (field_access object: (identifier) field: (identifier))) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (local_variable_declaration type: (array_type element: (integral_type) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier) value: (array_creation_expression type: (integral_type) dimensions: (dimensions_expr (decimal_integer_literal))))) (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: (array_access array: (identifier) index: (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: (decimal_integer_literal))) (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: (decimal_integer_literal))) (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (decimal_integer_literal) right: (parenthesized_expression (binary_expression left: (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (identifier)))) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (decimal_integer_literal))))) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (decimal_integer_literal) right: (identifier))))))))) (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (array_access array: (identifier) index: (identifier))))))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (identifier))))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (identifier)))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))))