60 lines
		
	
	
		
			1.7 KiB
		
	
	
	
		
			Markdown
		
	
	
	
	
	
			
		
		
	
	
			60 lines
		
	
	
		
			1.7 KiB
		
	
	
	
		
			Markdown
		
	
	
	
	
	
| ---
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| id: 5900f37f1000cf542c50fe92
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| challengeType: 5
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| title: 'Problem 19: Counting Sundays'
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| videoUrl: ''
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| localeTitle: 问题19:计算星期日
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| ---
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| 
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| ## Description
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| <section id="description">您将获得以下信息,但您可能更愿意为自己做一些研究。 <ul><li> 1900年1月1日是星期一。 </li><li>九月是三十天<br>四月,六月和十一月。 <br>其余的都有三十一个, <br>仅拯救二月, <br>其中有二十八,风雨无阻。 <br>在闰年,二十九岁。 </li><li>闰年发生在任何一年,可被4整除,但除非可被400整除,否则不会在一个世纪上。 </li>在二十世纪的第一个月(1901年1月1日至2000年12月31日),有多少个星期日下降? </ul></section>
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| 
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| ## Instructions
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| <section id="instructions">
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| </section>
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| 
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| ## Tests
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| <section id='tests'>
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| 
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| ```yml
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| tests:
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|   - text: '<code>countingSundays(1943, 1946)</code>应该返回6。'
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|     testString: 'assert.strictEqual(countingSundays(1943, 1946), 6, "<code>countingSundays(1943, 1946)</code> should return 6.");'
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|   - text: '<code>countingSundays(1995, 2000)</code>应该返回9。'
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|     testString: 'assert.strictEqual(countingSundays(1995, 2000), 9, "<code>countingSundays(1995, 2000)</code> should return 9.");'
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|   - text: '<code>countingSundays(1901, 2000)</code>应该返回171。'
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|     testString: 'assert.strictEqual(countingSundays(1901, 2000), 171, "<code>countingSundays(1901, 2000)</code> should return 171.");'
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| 
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| ```
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| 
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| </section>
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| 
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| ## Challenge Seed
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| <section id='challengeSeed'>
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| 
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| <div id='js-seed'>
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| 
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| ```js
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| function countingSundays(firstYear, lastYear) {
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|   // Good luck!
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|   return true;
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| }
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| 
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| countingSundays(1943, 1946);
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| 
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| ```
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| 
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| </div>
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| 
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| 
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| 
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| </section>
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| 
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| ## Solution
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| <section id='solution'>
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| 
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| ```js
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| // solution required
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| ```
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| </section>
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