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https://velyarunavaangel.com/2012/12/21/%d0%9d%d0%b5%d0%bc%d0%bd%d0%be%d0%b3%d0%be-%d0%be-%d0%b1%d0%b8%d0%bd%d0%b0%d1%80%d0%bd%d0%be%d1%81%d1%82%d0%b8/
Немного о бинарности..