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小葱怔住了。For 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.正在此时，会稽军发动了新的一轮进攻，更加坚定了陈辽的决心。而且，苏樱和小鱼儿在一起，那才是最合理的。终于，杨长帆举手铳向天空发出红色烟炮。天启，《白发魔女传》你应该写完了吧。This paper introduces the general setting method of Word column division, explains some problems encountered in Word column division, and also introduces the setting method of displaying multiple page numbers on one page after Word column division.