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							|  |  |  |  | id: 5900f5231000cf542c510034 | 
					
						
							|  |  |  |  | challengeType: 5 | 
					
						
							|  |  |  |  | title: 'Problem 438: Integer part of polynomial equation"s solutions' | 
					
						
							|  |  |  |  | videoUrl: '' | 
					
						
							|  |  |  |  | localeTitle: 问题438:多项式方程解的整数部分 | 
					
						
							|  |  |  |  | --- | 
					
						
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							|  |  |  |  | ## Description
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							|  |  |  |  | <section id="description">对于整数的n元组t =(a1,...,an),let(x1,...,xn)是多项式方程xn + a1xn-1 + a2xn-2 + ... +的解。 an-1x + an = 0。 <p>考虑以下两个条件:x1,...,xn都是真实的。如果x1,...,xn被排序,则⌊xi⌋= i,1≤i≤n。 (⌊·⌋:地板功能。) </p><p>在n = 4的情况下,有12个n元组的整数满足两个条件。我们将S(t)定义为t中整数绝对值的总和。对于n = 4,我们可以验证满足两个条件的所有n元组t的ΣS(t)= 2087。 </p><p>找到ΣS(t)为n = 7。 </p></section> | 
					
						
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							|  |  |  |  | ## Instructions
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										 |  |  |  | <section id="instructions"> | 
					
						
							|  |  |  |  | </section> | 
					
						
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							|  |  |  |  | ## Tests
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							|  |  |  |  | <section id='tests'> | 
					
						
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							|  |  |  |  | ```yml | 
					
						
							|  |  |  |  | tests: | 
					
						
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										 |  |  |  |   - text: <code>euler438()</code>应该返回2046409616809。 | 
					
						
							|  |  |  |  |     testString: assert.strictEqual(euler438(), 2046409616809); | 
					
						
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							|  |  |  |  | ``` | 
					
						
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							|  |  |  |  | </section> | 
					
						
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							|  |  |  |  | ## Challenge Seed
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							|  |  |  |  | <section id='challengeSeed'> | 
					
						
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							|  |  |  |  | <div id='js-seed'> | 
					
						
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							|  |  |  |  | ```js | 
					
						
							|  |  |  |  | function euler438() { | 
					
						
							|  |  |  |  |   // Good luck! | 
					
						
							|  |  |  |  |   return true; | 
					
						
							|  |  |  |  | } | 
					
						
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							|  |  |  |  | euler438(); | 
					
						
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							|  |  |  |  | ``` | 
					
						
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							|  |  |  |  | </div> | 
					
						
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							|  |  |  |  | </section> | 
					
						
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							|  |  |  |  | ## Solution
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							|  |  |  |  | <section id='solution'> | 
					
						
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							|  |  |  |  | ```js | 
					
						
							|  |  |  |  | // solution required | 
					
						
							|  |  |  |  | ``` | 
					
						
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							|  |  |  |  | /section> |