A, B, and C play a game of chess, and every two players play a game. It is stipulated: 2 points for winning a game, 0 points for losing, and 1 point for a tie. After all three games of chess are played, A If you get 3 points and B gets 1 point, how many points will C get?
甲、乙、丙三人进行象棋比赛，每两人赛一盘，规定：赢一盘得2分，输得0分，打平各得1分，全部比赛的三盘棋下完后，甲得3分，乙得1分，那么丙得多少分．
<gadget id="calculator">2 * 3</gadget>
<output>6</output>

<gadget id="calculator">6 - 3 - 1</gadget>
<output>2</output>

<result>2</result>