ccf csp何以包邮

根据引用中的代码，我们可以看到CCF CSP包邮的条件是购物车中的图书总价格大于等于包邮的最低值。在这个问题中，假设购物车中图书数量为n，包邮的最低值为x，每本书的价格存储在列表a中。程序通过遍历每本书的价格，并将其与已经存在的可能组合的价格进行比较，得出最低的包邮费用。具体的实现过程可以参考引用中给出的代码。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
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