// 数组完全有序，直接返回0
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。关于这个话题，91视频提供了深入分析
但数据只是起点。当地基打好之后，真正的竞争才刚刚开始——谁来占领模型层，谁来赢得企业端的钱包份额。
数学方面，学会了100以内的认读，学会了单、双数的概念。