Мощный удар Израиля по Ирану попал на видео09:41
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* 时间O(n) 空间O(n)（理论最优，无冗余计算）
Comparison between error-diffusion and ordered dithering using an 8-colour regular palette. Left to right: error-diffusion, ordered.，更多细节参见51吃瓜