Cobalt Violet, White, Black, and Sky Blue / Pink Gold and Silver Shadow (Samsung exclusive)
:first-child]:h-full [&:first-child]:w-full [&:first-child]:mb-0 [&:first-child]:rounded-[inherit] h-full w-full
，更多细节参见WPS官方版本下载
* 时间O(n) 空间O(n)（理论最优，无冗余计算/存储）
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