static int numberOfSolutions ( int n ) {
  int c = 0 ;
  for ( int x = 0 ;
  x <= n ;
  ++ x ) if ( n == x + ( n ^ x ) ) ++ c ;
  return c ;
}

static int numberOfSolutions ( int n ) { int c = 0 ; for ( int x = 0 ; x <= n ; ++ x ) if ( n == x + ( n ^ x ) ) ++ c ; return c ; }
(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))) (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: (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (binary_expression left: (identifier) right: (parenthesized_expression (binary_expression left: (identifier) right: (identifier)))))) consequence: (expression_statement (update_expression (identifier))))) (return_statement (identifier))))