static boolean isPrime ( int n ) {
  coef ( n ) ;
  c [ 0 ] ++ ;
  c [ n ] -- ;
  int i = n ;
  while ( ( i -- ) > 0 && c [ i ] % n == 0 ) ;
  return i < 0 ;
}

static boolean isPrime ( int n ) { coef ( n ) ; c [ 0 ] ++ ; c [ n ] -- ; int i = n ; while ( ( i -- ) > 0 && c [ i ] % n == 0 ) ; return i < 0 ; }
(method_declaration (modifiers) type: (boolean_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier))) body: (block (expression_statement (method_invocation name: (identifier) arguments: (argument_list (identifier)))) (expression_statement (update_expression (array_access array: (identifier) index: (decimal_integer_literal)))) (expression_statement (update_expression (array_access array: (identifier) index: (identifier)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (identifier))) (while_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (parenthesized_expression (update_expression (identifier))) right: (decimal_integer_literal)) right: (binary_expression left: (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (identifier)) right: (decimal_integer_literal))))) (return_statement (binary_expression left: (identifier) right: (decimal_integer_literal)))))