目录写在前面正文为什么都用def forward，而不改个名字？forward有什么特殊功能？第一条：.forward()可以不写第二条：优先运行forward方法总结写在前面
I am implementing DES Encryption in Java with use of BigIntegers. I am left shifting binary keys with Java BigIntegers by doing the BigInteger.leftShift(int n) method. Key of N (Kn) is dependent on t
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