When Xiaoli participated in the swimming competition, she shook hands with all the competitors once, and she shook hands 50 times in total. Do you know how many competitors participated in the competition?
小丽参加游泳比赛时，和所有参赛的选手都握了一次手，一共握了50次手，你知道参加比赛的选手一共有多少人吗？
<result>50</result>