public static boolean possible ( int n ) {
  if ( n > 3 ) {
    int sum = ( n * ( n + 1 ) ) / 2 ;
    if ( sum % 3 == 0 ) {
      return true ;
    }
  }
  return false ;
}

public static boolean possible ( int n ) { if ( n > 3 ) { int sum = ( n * ( n + 1 ) ) / 2 ; if ( sum % 3 == 0 ) { return true ; } } return false ; }
(method_declaration (modifiers) type: (boolean_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier))) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) consequence: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))))) right: (decimal_integer_literal)))) (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (decimal_integer_literal))) consequence: (block (return_statement (true)))))) (return_statement (false))))