Sum square difference
Problem 6
The sum of the squares of the first ten natural numbers is,
12 + 22 + ... + 102 = 385
The square of the sum of the first ten natural numbers is,
(1 + 2 + ....
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编程语言 时间:
2015-01-27 09:34:10
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170
Special Pythagorean triplet
Problem 9
A Pythagorean triplet is a set of three natural numbers, a b c,
for which,
a2 + b2 = c2
For example, 32 + 42 = 9 + 16 = 25 = 52.
There exists exact...
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编程语言 时间:
2015-01-27 09:32:08
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181
Sumdiv
Time Limit: 1000MS
Memory Limit: 30000K
Total Submissions: 14953
Accepted: 3680
Description
Consider two natural numbers A and B. Let S be the sum of all natural...
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其他好文 时间:
2015-01-23 09:34:34
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236
Multiplying by Rotation
Warning: Not all numbers in this problem are decimal numbers!
Multiplication of natural numbers in general is a cumbersome operation. In some cases howev...
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其他好文 时间:
2015-01-18 17:13:10
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147
本章翻译自Elasticsearch官方指南的Filtering Queries and Aggregations一章。
过滤查询以及聚合
A natural extension to aggregation scoping is filtering. Because the aggregation operates in the context of the quer...
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其他好文 时间:
2015-01-16 01:15:49
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1158
Problem E: How many 0's?A Benedict monk No. 16 writes down the decimal representations of all natural numbers between and includingmandn,m≤n. How many...
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其他好文 时间:
2015-01-15 23:30:26
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216
SQL:1999基本语法SELECT [DISTINCT] * | 列名称 [AS]别名,........FROM 表名称1 [别名1][CROSS JOIN表名称2 别名2]|[NATURAL JOIN表名称2 别名2][ JOIN表名称2 别名2 USING (关联列名称)][ JOIN表名称2...
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数据库 时间:
2015-01-10 06:37:14
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196
When InnoDB appears hung, I know the natural reaction is to check SHOW ENGINE INNODB STATUS.In fact, it’s the first thing I check when InnoDB tables a...
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数据库 时间:
2015-01-05 01:51:06
阅读次数:
219
类实现了Comparable接口就表明类的实例本身具有内在的排序关系(natural ordering)。因此,该类可以与很多泛型算法和集合实现进行协作。而我们之需要实现Comparable接口唯一的方法——compareTo。 以下是相关规则:sgn(x.compareTo(y)) = -sgn....
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其他好文 时间:
2014-12-30 21:53:27
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231
恶补下英语,不知道以后用不用的上1.reach an impasse: 遭遇窘境2.childhood issues:童年的问题3.be a natural at sth.:擅长做某事4.roll the dice:滚筛子5.be pedantic:迂腐的6.look on the bright s...
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其他好文 时间:
2014-12-26 00:47:19
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276