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Public class TreeNode {(未完待续……) show_style();。It is easy to see that OvR only needs to train N classifiers, while OvO needs to train N (N-1)/2 classifiers, so the storage overhead and test time overhead of OvO are usually larger than OvR. However, in training, each classifier of OVR uses all training samples, while each classifier of OVO only uses samples of two classes. Therefore, when there are many classes, the training time cost of OVO is usually smaller than that of OVR. As for the prediction performance, it depends on the specific data distribution, which is similar in most cases.越王仁慈，体谅他的苦楚，于是就在这里开垦土地，种植庄稼，还修建了洪都城和大量的房屋分给百姓居住。　　恰巧，这些罪犯当中就有千里迢迢来抗日前线的甄一然的恋人惠文以及美貌泼　　九州八荒之下，她又是否能够承载这一场超越三生三世的亘古之恋？1945年8月15日，日本帝国主义无条件投降，至此，宣告了第二次世界大战的胜利结束，然而在中国却开始了两种命运，两种前途的决战。两个前途的一场殊死斗争，展现了中国共产党在世界斗争格局中的历史作用，着重描绘了中国共产党领导人民革命推翻反动统治，建立新中国、人民当家做主的艰难而辉煌的战斗历程，艺术地再现了无产阶级革命领袖叱咤风云的风采，展现了世界伟人斗智斗勇的政治家风度及其人格魅力。