Title Text:The only winning move is to play, perfectly, waiting for your opponent to make a mistake. Origin:https://xkcd.com/832/ https://www.explainxkcd.com/wiki/index.php/832:_Tic-Tac-Toe 在下文中，我们将使用numpad表示法来进行井字游戏，即： 7 | 8 | 9 – + – + – 4 | 5 | 6 – + – + –…