样例解释 #1:下面一层半径为 44,高度为 1212,上面一层半径为 22,高度为 11

消耗奶油数量 $4\times 4 + 4\times 12\times 2+2\times 1\times 2=68$。可以证明这是最少的消耗奶油数量。

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20
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1000ms
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