public static void main ( String [ ] args ) {
  Scanner s = new Scanner ( System . in ) ;
  long nCnt = 0 ;
  long ans = 0 ;
  long zeroCnt = 0 ;
  int n = s . nextInt ( ) ;
  long arr [ ] = new long [ n ] ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    arr [ i ] = s . nextLong ( ) ;
    if ( arr [ i ] < 0 ) nCnt ++ ;
    if ( arr [ i ] == 0 ) zeroCnt ++ ;
    ans += ( Math . abs ( ( Math . abs ( arr [ i ] ) - 1 ) ) ) % 1000000007 ;
  }
  if ( ( nCnt & 1 ) == 1 && zeroCnt == 0 ) ans += 2 ;
  System . out . println ( ans ) ;
}

public static void main ( String [ ] args ) { Scanner s = new Scanner ( System . in ) ; long nCnt = 0 ; long ans = 0 ; long zeroCnt = 0 ; int n = s . nextInt ( ) ; long arr [ ] = new long [ n ] ; for ( int i = 0 ; i < n ; i ++ ) { arr [ i ] = s . nextLong ( ) ; if ( arr [ i ] < 0 ) nCnt ++ ; if ( arr [ i ] == 0 ) zeroCnt ++ ; ans += ( Math . abs ( ( Math . abs ( arr [ i ] ) - 1 ) ) ) % 1000000007 ; } if ( ( nCnt & 1 ) == 1 && zeroCnt == 0 ) ans += 2 ; 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 (field_access object: (identifier) field: (identifier)))))) (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: (decimal_integer_literal))) (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)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) dimensions: (dimensions) value: (array_creation_expression type: (integral_type) dimensions: (dimensions_expr (identifier))))) (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)))) (if_statement condition: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (decimal_integer_literal))) consequence: (expression_statement (update_expression (identifier)))) (if_statement condition: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (decimal_integer_literal))) consequence: (expression_statement (update_expression (identifier)))) (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (parenthesized_expression (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (parenthesized_expression (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (array_access array: (identifier) index: (identifier)))) right: (decimal_integer_literal)))))) right: (decimal_integer_literal)))))) (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (decimal_integer_literal)) right: (binary_expression left: (identifier) right: (decimal_integer_literal)))) consequence: (expression_statement (assignment_expression left: (identifier) right: (decimal_integer_literal)))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (identifier))))))