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Описание. Even though you may add two spaces after each sentence when writing a post (assuming you subscribe to a writing style that suggests such ...
ru.wordpress.orgen.oxforddictionaries.com
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dic.academic.ru
It is perhaps slightly misworded. The key idea is that for any tree, we can pick any root and direct each of the edges so that only the chosen root of the tree is ...
codeforces.com