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After the first and third games in the NBA, both sides take a two-minute break and a 15-minute break. The long break in the NBA is due to the fact that the NBA is a very profitable organization and needs to give TV broadcasts more time to broadcast advertisements. The half-time break in other basketball matches is ten minutes.As early as 2005, several gambling groups discovered a defect of WinFall lottery system: when the accumulated bonus is divided equally among all participants, you can earn an average of .3 for every lottery ticket you buy. Every time the pool exceeds 2 million US dollars, this so-called "roll-down" split occurs.Oppo mobile phones focus on the young people's market. TFBOYS is a little fresh meat among the little fresh meat. It cannot be said without signing. Oppo launched the R9 TFBOYS custom mobile phone, "I am your TFphone", and many younger sisters rushed to buy it.DNS magnification attackFor codes of the same length, theoretically, the further the coding distance between any two categories, the stronger the error correction capability. Therefore, when the code length is small, the theoretical optimal code can be calculated according to this principle. However, it is difficult to effectively determine the optimal code when the code length is slightly larger. In fact, this is an NP-hard problem. However, we usually do not need to obtain theoretical optimal codes, because non-optimal codes can often produce good enough classifiers in practice. On the other hand, it is not that the better the theoretical properties of coding, the better the classification performance, because the machine learning problem involves many factors, such as dismantling multiple classes into two "class subsets", and the difficulty of distinguishing the two class subsets formed by different dismantling methods is often different, that is, the difficulty of the two classification problems caused by them is different. Therefore, one theory has a good quality of error correction, but it leads to a difficult coding for the two-classification problem, which is worse than the other theory, but it leads to a simpler coding for the two-classification problem, and it is hard to say which is better or weaker in the final performance of the model.TreeNode root = null;1. Take MIUI system as an example, click the "Settings" application icon on the desktop of the mobile phone;