static int getPassingCars ( int A [ ] , int n ) {
  int countOne = 0 , result = 0 ;
  while ( n >= 1 ) {
    if ( A [ n - 1 ] == 1 ) countOne ++ ;
    else result += countOne ;
    n -- ;
  }
  return result ;
}

static int getPassingCars ( int A [ ] , int n ) { int countOne = 0 , result = 0 ; while ( n >= 1 ) { if ( A [ n - 1 ] == 1 ) countOne ++ ; else result += countOne ; n -- ; } return result ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier) dimensions: (dimensions)) (formal_parameter type: (integral_type) name: (identifier))) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal)) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (while_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (decimal_integer_literal))) consequence: (expression_statement (update_expression (identifier))) alternative: (expression_statement (assignment_expression left: (identifier) right: (identifier)))) (expression_statement (update_expression (identifier))))) (return_statement (identifier))))