FlareOn5 Minesweeper Championship Registration

https://buuoj.cn/challenges#[FlareOn5]Minesweeper%20Championship%20Registration

https://blog.csdn.net/mcmuyanga/article/details/115420075

java 逆向

jd-gui 打开

import javax.swing.JOptionPane;  
  
public class InviteValidator {  
  public static void main(String[] args) {  
    String response = JOptionPane.showInputDialog(null, "Enter your invitation code:", "Minesweeper Championship 2018", 3);  
    if (response.equals("[email protected]")) {  
      JOptionPane.showMessageDialog(null, "Welcome to the Minesweeper Championship 2018!\nPlease enter the following code to the ctfd.flare-on.com website to compete:\n\n" + response, "Success!", -1);  
    } else {  
      JOptionPane.showMessageDialog(null, "Incorrect invitation code. Please try again next year.", "Failure", 0);  
    }   
  }  
}

[email protected]