The Communist Youth League organized a gathering of 54 youths. The first young woman who came to the meeting shook hands with all the young men, the second young woman who came to the meeting was only one young man away from shaking hands, and the third young woman who came to the meeting was only two young men away After passing hands, the fourth young woman who came to the meeting was only three young men who had not shaken hands, and so on. The last young woman who attended shook hands with seven young men. How many young men will participate in this party.
共青团组织54名青年联欢会．第一个到会的女青年同全部的男青年握过手，第二个到会的女青年只差1个男青年没握过手，第三个到会的女青年只差2个男青年没握过手，第四个到会的女青年只差3个男青年没握过手，依此类推，最后一个到会的女青年同7个的男青年握过手，这次联欢会有多少男青年参加．
<gadget id="calculator">54 - 1</gadget>
<output>53</output>

<gadget id="calculator">7 + 53</gadget>
<output>60</output>

<gadget id="calculator">1 + 1</gadget>
<output>2</output>

<gadget id="calculator">60 / 2</gadget>
<output>30</output>

<result>30</result>