Comparison between error-diffusion dithering and ordered dithering. Left to right: error-diffusion, ordered.
描述：n 个人排成一列，heights[i] 为第 i 个人的高度（互不相同）。第 i 个人能「看到」右侧第 j 个人的条件是：i < j 且两人之间所有人都比他们矮。返回 answer[i] 为第 i 个人在右侧能看到的人数。
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"That's where he came up with the idea of starting a soda-bottling business," says Ben Hartwig.
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lack of a compelling angle. Let's try IBM. IBM is such an important, famous