4.10 581. 最短无序连续子数组
Notice how the highlighted region shrinks at each step. The algorithm never examines points outside the narrowing window. In a balanced tree with nnn points, this takes about log4(n)\log_4(n)log4(n) steps. For a million points, that's roughly 10 steps instead of a million comparisons.，推荐阅读服务器推荐获取更多信息
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If an area does not have any color coding, it means there are no conditions on the portions of dominoes within those spaces.