There are 100 people participating in three events, and each person participates in at least one event. Among them, there are 5 people who did not participate in the long jump, 60 people who did not participate in the high jump, and 70 people who did not participate in the race. How many people participated in more than one event? Project competition?
有100人参加三个项目，每人至少参加一项，其中未参加的跳远的有5人，为参加跳高的有60人，未参加赛跑的有70人，那么至少有多少人参加了不止一个项目的比赛？
<gadget id="calculator">100 - 50</gadget>
<output>50</output>

<gadget id="calculator">100 - 60</gadget>
<output>40</output>

<gadget id="calculator">100 - 70</gadget>
<output>30</output>

<gadget id="calculator">30 - 100</gadget>
<output>-70</output>

<gadget id="calculator">50 + 40 + (-70)</gadget>
<output>20</output>

<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<result>10</result>