static void solve ( ) throws Exception {
  int n = scanInt ( ) , a = scanInt ( ) , b = scanInt ( ) ;
  if ( ( Integer . bitCount ( a ^ b ) & 1 ) == 0 ) {
    out . print ( "NO" ) ;
  }
  else {
    out . println ( "YES" ) ;
    go ( ( 1 << n ) - 1 , a , b ) ;
  }
}

static void solve ( ) throws Exception { int n = scanInt ( ) , a = scanInt ( ) , b = scanInt ( ) ; if ( ( Integer . bitCount ( a ^ b ) & 1 ) == 0 ) { out . print ( " NO " ) ; } else { out . println ( " YES " ) ; go ( ( 1 << n ) - 1 , a , b ) ; } }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters) (throws (type_identifier)) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation name: (identifier) arguments: (argument_list))) declarator: (variable_declarator name: (identifier) value: (method_invocation name: (identifier) arguments: (argument_list))) declarator: (variable_declarator name: (identifier) value: (method_invocation name: (identifier) arguments: (argument_list)))) (if_statement condition: (parenthesized_expression (binary_expression left: (parenthesized_expression (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (identifier)))) right: (decimal_integer_literal))) right: (decimal_integer_literal))) consequence: (block (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (string_literal))))) alternative: (block (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (string_literal)))) (expression_statement (method_invocation name: (identifier) arguments: (argument_list (binary_expression left: (parenthesized_expression (binary_expression left: (decimal_integer_literal) right: (identifier))) right: (decimal_integer_literal)) (identifier) (identifier))))))))