56 lines
		
	
	
		
			1.2 KiB
		
	
	
	
		
			Markdown
		
	
	
	
	
	
		
		
			
		
	
	
			56 lines
		
	
	
		
			1.2 KiB
		
	
	
	
		
			Markdown
		
	
	
	
	
	
|   | --- | |||
|  | id: 5900f53a1000cf542c51004c | |||
|  | challengeType: 5 | |||
|  | title: 'Problem 461: Almost Pi' | |||
|  | videoUrl: '' | |||
|  | localeTitle: 问题461:几乎是Pi | |||
|  | --- | |||
|  | 
 | |||
|  | ## Description
 | |||
|  | <section id="description">对于所有非负整数k,设fn(k)= ek / n-1。值得注意的是,f200(6)+ f200(75)+ f200(89)+ f200(226)= 3.141592644529 ...≈π。事实上,对于n = 200,它是fn(a)+ fn(b)+ fn(c)+ fn(d)形式的π的最佳近似值。设g(n)= a2 + b2 + c2 + d 2为a,b,c,d最小化错误:| fn(a)+ fn(b)+ fn(c)+ fn(d) - π| (其中| x |表示x的绝对值)。给出g(200)= 62 + 752 + 892 + 2262 = 64658.求g(10000)。 </section> | |||
|  | 
 | |||
|  | ## Instructions
 | |||
|  | <section id="instructions"> | |||
|  | </section> | |||
|  | 
 | |||
|  | ## Tests
 | |||
|  | <section id='tests'> | |||
|  | 
 | |||
|  | ```yml | |||
|  | tests: | |||
|  |   - text: <code>euler461()</code>应该返回159820276。 | |||
|  |     testString: 'assert.strictEqual(euler461(), 159820276, "<code>euler461()</code> should return 159820276.");' | |||
|  | 
 | |||
|  | ``` | |||
|  | 
 | |||
|  | </section> | |||
|  | 
 | |||
|  | ## Challenge Seed
 | |||
|  | <section id='challengeSeed'> | |||
|  | 
 | |||
|  | <div id='js-seed'> | |||
|  | 
 | |||
|  | ```js | |||
|  | function euler461() { | |||
|  |   // Good luck! | |||
|  |   return true; | |||
|  | } | |||
|  | 
 | |||
|  | euler461(); | |||
|  | 
 | |||
|  | ``` | |||
|  | 
 | |||
|  | </div> | |||
|  | 
 | |||
|  | 
 | |||
|  | 
 | |||
|  | </section> | |||
|  | 
 | |||
|  | ## Solution
 | |||
|  | <section id='solution'> | |||
|  | 
 | |||
|  | ```js | |||
|  | // solution required | |||
|  | ``` | |||
|  | </section> |