Zhao Yun, Sun Lin, Li Hong, and Zhou Li are playing badminton. There is one match between each of them. Zhao Yun won 3 games and Sun Lin won 2 games. How many games can Li Hong win at most?
赵云、孙林、李红、周丽四人进行羽毛球比赛，每两人之间要进行一场比赛，赵云胜了3场，孙林胜了2场，李红最多能胜几场？
<gadget id="calculator">6 - 3 - 2</gadget>
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<result>1</result>