Reversing.kr Multiplicative 풀이

그냥 자바디컴파일을 한다.

// Decompiled by Jad v1.5.8g. Copyright 2001 Pavel Kouznetsov.
// Jad home page: http://www.kpdus.com/jad.html
// Decompiler options: packimports(3) 
// Source File Name:   JavaCrackMe.java

import java.io.PrintStream;

public class JavaCrackMe
{

    public JavaCrackMe()
    {
    }

    public static final synchronized volatile transient void main(String args[])
    {
        try
        {
            System.out.println("Reversing.Kr CrackMe!!");
            System.out.println("-----------------------------");
            System.out.println("The idea came out of the warsaw's crackme");
            System.out.println("-----------------------------\n");
            long l = Long.decode(args[0]).longValue();
            l *= 26729L;
            if(l == 0xeaaeb43e477b8487L)
                System.out.println("Correct!");
            else
                System.out.println("Wrong");
        }
        catch(Exception exception)
        {
            System.out.println("Please enter a 64bit signed int");
        }
    }
}

힌트 : 수학;;