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37 lines
2.1 KiB
HTML
37 lines
2.1 KiB
HTML
<!DOCTYPE html>
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<h1>1079. Total Sales of Supply Chain (25)</h1>
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<div id="problemContent">
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<p>A supply chain is a network of retailers（零售商）, distributors（经销商）, and suppliers（供应商）-- everyone involved in moving a product from supplier to customer.</p>
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<p>
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Starting from one root supplier, everyone on the chain buys products from one's supplier in a price P and sell or distribute them in a price that is r% higher than P. Only the retailers will face the customers.
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It is assumed that each member in the supply chain has exactly one supplier except the root supplier, and there is no supply cycle.</p>
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<p>
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Now given a supply chain, you are supposed to tell the total sales from all the retailers.</p>
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<p><b>
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Input Specification:
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</b></p>
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<p>Each input file contains one test case. For each case, the first line contains three positive numbers: N (<=10<sup>5</sup>), the total number of the members in the supply chain (and hence their ID's are numbered from 0 to N-1, and the root supplier's ID is 0); P, the unit price given by the root supplier; and r, the percentage rate of price increment for each distributor or retailer. Then N lines follow, each describes a distributor or retailer in the following format:</p>
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<p>K<sub>i</sub> ID[1] ID[2] ... ID[K<sub>i</sub>]</p>
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<p>where in the i-th line, K<sub>i</sub> is the total number of distributors or retailers who receive products from supplier i, and is then followed by the ID's of these distributors or retailers. K<sub>j</sub> being 0 means that the j-th member is a retailer, then instead the total amount of the product will be given after K<sub>j</sub>. All the numbers in a line are separated by a space.</p>
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<p><b>
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Output Specification:
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</b></p>
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<p>For each test case, print in one line the total sales we can expect from all the retailers, accurate up to 1 decimal place. It is guaranteed that the number will not exceed 10<sup>10</sup>.</p>
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<b>Sample Input:</b><pre>
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10 1.80 1.00
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3 2 3 5
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1 9
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1 4
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1 7
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0 7
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2 6 1
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1 8
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0 9
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0 4
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0 3
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</pre>
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<b>Sample Output:</b><pre>
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42.4
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</pre>
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</div> |