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[From you comment] P.S need such combinatorics after which I can understand the course of data structures and algorithms. Combinatorics don't factor into data structures and algorithms in this way. If your goal is to understand data structures and algorithms, combinatorics are an irrelevant topic. Combinatorics is also quite vague, as this can effectively ...


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If you have a metal surface to work on, such as some whiteboards, you can get "magnetic paper". These are sheets of various sizes that are magnetic and can be written on with markers or printed on. With erasable markers they can be reused. They can also be cut to size with a scissors. They will, of course, stick to any metal surface and can be removed and ...


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I believe that using one key for access, even with unique passwords, is inadvisable. Teaching moments aside, each student should have their own, revocable, restrict-able, key pair. However, as I understand the intentions, you should be able to achieve your goal this way. Short answer Point 1: Edit the instance's /etc/ssh/sshd_config file and check that ...


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