static long grundy ( long n ) {
  long ans = 1 ;
  while ( n % ans == 0 ) ans <<= 1 ;
  return ans ;
}

static long grundy ( long n ) { long ans = 1 ; while ( n % ans == 0 ) ans <<= 1 ; return ans ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier))) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (while_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (identifier)) right: (decimal_integer_literal))) body: (expression_statement (assignment_expression left: (identifier) right: (decimal_integer_literal)))) (return_statement (identifier))))