A, B, and C have a three-person table tennis match. The two players watch the game alone. After each game, the winner continues to play, and the loser changes to another player. This continues. As a result, A won 11 games and B won. 9 games, C won 3 games, then how many games did C play in total?
A，B，C三人进行乒乓球赛，两人比赛一人观战，每赛一场后胜者继续打，负者换另一个人上场，一直这样进行下去，结果A胜了11场，B胜了9场，C胜了3场，那么C总共打了多少场．
<gadget id="calculator">5 + 4 + 2 + 2</gadget>
<output>13</output>

<result>13</result>