第五十七条 冒领、隐匿、毁弃、倒卖、私自开拆或者非法检查他人邮件、快件的，处警告或者一千元以下罚款；情节较重的，处五日以上十日以下拘留。
Uniform regions (solid backgrounds, smooth gradients) get stored as large blocks. Detailed regions (edges, textures) get subdivided into smaller blocks. You end up with a compressed representation that preserves detail where it exists and simplifies where it can.
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if (n <= 1) return;
Силовые структуры