static long powGCD ( long a , long n , long b ) {
  for ( int i = 0 ;
  i < n ;
  i ++ ) a = a * a ;
  return gcd ( a , b ) ;
}

static long powGCD ( long a , long n , long b ) { for ( int i = 0 ; i < n ; i ++ ) a = a * a ; return gcd ( a , b ) ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier)) (formal_parameter type: (integral_type) name: (identifier)) (formal_parameter type: (integral_type) name: (identifier))) body: (block (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: (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (identifier))))) (return_statement (method_invocation name: (identifier) arguments: (argument_list (identifier) (identifier))))))