Sicily 1119. Factstone Benchmark

左手的ㄟ右手 2022-08-08 13:40 52阅读 0赞

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        Time Limit: 1sec &nbsp;&nbsp; Memory Limit:32MB 
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        Description 
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        Amtel has announced that it will release a 128-bit computer chip by 2010, a 256-bit computer by 2020, and so on, continuing its strategy of doubling the word-size every ten years. (Amtel released a 64-bit computer in 2000, a 32-bit computer in 1990, a 16-bit computer in 1980, an 8-bit computer in 1970, and a 4-bit computer, its first, in 1960.) 
       <p>Amtel will use a new benchmark - the&nbsp;<em>Factstone</em>&nbsp;- to advertise the vastly improved capacity of its new chips. The&nbsp;<em>Factstone</em>&nbsp;rating is defined to be the largest integer&nbsp;<em>n</em>&nbsp;such that&nbsp;<em>n!</em>&nbsp;can be represented as an unsigned integer in a computer word.</p> 
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        Input 
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        Given a year&nbsp; 
       <em>1960 ≤ y ≤ 2160</em>, what will be the&nbsp; 
       <em>Factstone</em>&nbsp;rating of Amtel's most recently released chip? 
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        Output 
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        There are several test cases. For each test case, there is one line of input containing&nbsp; 
       <em>y</em>. A line containing 0 follows the last test case. For each test case, output a line giving the Factstone rating. 
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        Sample Input 
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       <img alt="" style="border:0px; vertical-align:middle">&nbsp;Copy sample input to clipboard 
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       <pre style="overflow:auto; font-family:'Courier New',monospace; font-size:12pt; line-height:15pt; border:1px solid; margin-left:10px">1960
1981
0
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        Sample Output 
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       <pre style="overflow:auto; font-family:'Courier New',monospace; font-size:12pt; line-height:15pt; border:1px solid; margin-left:10px">3
8
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