今野晴貴『ヤバい会社の餌食にならないための労働法』

ヤバい会社の餌食にならないための労働法 (幻冬舎文庫)作者: 今野晴貴出版社/メーカー: 幻冬舎発売日: 2013/06/11メディア: 文庫この商品を含むブログを見る 労働問題を扱うNPO代表でありブラック企業に関する著書で有名な今野晴貴氏による薄い文庫本。 『マ…

Project Euler Problem 25

The Fibonacci sequence is defined by the recurrence relation: F_{n} = F_{n}−1 + F_{n}−2, where F_{1} = 1 and F_{2} = 1.The 12th term, F_{12}, is the first term to contain three digits. What is the first term in the Fibonacci sequence to co…

B. L. van der Waerden 『Algebra』

Algebra : Volume I作者: B.L. van der Waerden,F. Blum,J.R. Schulenberg出版社/メーカー: Springer発売日: 2003/10/21メディア: ペーパーバック購入: 2人 クリック: 2回この商品を含むブログを見る B. L. van der Waerden 『Algebra』Springer抽象代数学の…

Project Euler Problem 24

A permutation is an ordered arrangement of objects. For example, 3124 is one possible permutation of the digits 1, 2, 3 and 4. If all of the permutations are listed numerically or alphabetically, we call it lexicographic order. The lexicog…

Project Euler Problem 23

A perfect number is a number for which the sum of its proper divisors is exactly equal to the number. For example, the sum of the proper divisors of 28 would be 1 + 2 + 4 + 7 + 14 = 28, which means that 28 is a perfect number. A number n i…

Project Euler Problem 22

Using names.txt, a 46K text file containing over five-thousand first names, begin by sorting it into alphabetical order. Then working out the alphabetical value for each name, multiply this value by its alphabetical position in the list to…

Project Euler Problem 21

Let \$d(n)\$ be defined as the sum of proper divisors of \$n\$ (numbers less than \$n\$ which divide evenly into \$n\$). If \$d(a) = b\$ and \$d(b) = a\$, where \$a \not= b\$, then \$a\$ and \$b\$ are an amicable pair and each of \$a\$ and \$b\$ are called amic…