public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  int tc = sc . nextInt ( ) ;
  for ( ;
  tc > 0 ;
  tc -- ) {
    int n = sc . nextInt ( ) ;
    int zero = 0 ;
    int sum = 0 ;
    for ( int i = 0 ;
    i < n ;
    ++ i ) {
      int x = sc . nextInt ( ) ;
      if ( x == 0 ) zero ++ ;
      sum += x ;
    }
    if ( zero == 0 && sum != 0 ) {
      System . out . println ( 0 ) ;
      continue ;
    }
    if ( zero == 0 && sum == 0 ) {
      System . out . println ( 1 ) ;
      continue ;
    }
    sum += zero ;
    if ( sum == 0 ) zero ++ ;
    System . out . println ( zero ) ;
  }
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; int tc = sc . nextInt ( ) ; for ( ; tc > 0 ; tc -- ) { int n = sc . nextInt ( ) ; int zero = 0 ; int sum = 0 ; for ( int i = 0 ; i < n ; ++ i ) { int x = sc . nextInt ( ) ; if ( x == 0 ) zero ++ ; sum += x ; } if ( zero == 0 && sum != 0 ) { System . out . println ( 0 ) ; continue ; } if ( zero == 0 && sum == 0 ) { System . out . println ( 1 ) ; continue ; } sum += zero ; if ( sum == 0 ) zero ++ ; System . out . println ( zero ) ; } }
(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: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (for_statement condition: (binary_expression left: (identifier) right: (decimal_integer_literal)) update: (update_expression (identifier)) body: (block (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: (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 (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) consequence: (expression_statement (update_expression (identifier)))) (expression_statement (assignment_expression left: (identifier) right: (identifier))))) (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (binary_expression left: (identifier) right: (decimal_integer_literal)))) consequence: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (decimal_integer_literal)))) (continue_statement))) (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (binary_expression left: (identifier) right: (decimal_integer_literal)))) consequence: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (decimal_integer_literal)))) (continue_statement))) (expression_statement (assignment_expression left: (identifier) right: (identifier))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) consequence: (expression_statement (update_expression (identifier)))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (identifier))))))))