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.
HTMLMediaElement — WHATWG HTML Living Standard
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Number (0): Everything in this space must add up to 0. The answer is 3-0, placed vertically.
,更多细节参见夫子
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