steloflute

http://ratmsma.tistory.com/entry/40036994012 http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vccore98/HTML/lnk1169.asp fatal error LNK1169: one or more multiply defined symbols found /FORCE:multiple in you linker settings. lnk1169 에러 -> liker settings 에 /FORCE:multiple 을 삽입한다.

Console.WriteLine(Enumerable.Range(1, 999).Where(x => x % 3 == 0 || x % 5 == 0).Sum());

Page name: 주민등록번호 Author: 위키백과 contributors Publisher: 위키백과, . Date of last revision: 4 4월 2012 06:50 UTC Date retrieved: 27 5월 2012 15:06 UTC Permanent URL: http://ko.wikipedia.org/w/index.php?title=%EC%A3%BC%EB%AF%BC%EB%93%B1%EB%A1%9D%EB%B2%88%ED%98%B8&oldid=8501269 Page Version ID: 8501269 주민등록번호(住民登錄番號, Resident Registration Number, RRN)는 주민등록법에 의해 부여되며, 대한민국에서 대한민국 이외에 거주하지 않는 모든 국민에게 발급하는 ..

Python 프로그래머가 Scheme 프로그래머가 되는 방법을 설명해 준다. http://www.artima.com/weblogs/viewpost.jsp?thread=238789

Problem 211 04 October 2008 For a positive integer n, let σ2(n) be the sum of the squares of its divisors. For example, σ2(10) = 1 + 4 + 25 + 100 = 130. Find the sum of all n, 0 n 64,000,000 such that σ2(n) is a perfect square. Solution in C# Brute force took several hours. using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Numerics; namespace Eule..

Problem 58 05 December 2003 Starting with 1 and spiralling anticlockwise in the following way, a square spiral with side length 7 is formed. 37 36 35 34 33 32 31 38 17 16 15 14 13 30 39 18 5 4 3 12 29 40 19 6 1 2 11 28 41 20 7 8 9 10 27 42 21 22 23 24 25 26 43 44 45 46 47 48 49It is interesting to note that the odd squares lie along the bottom right diagonal, but what is more interesting is that..

Problem 57 21 November 2003 It is possible to show that the square root of two can be expressed as an infinite continued fraction. 2 = 1 + 1/(2 + 1/(2 + 1/(2 + ... ))) = 1.414213... By expanding this for the first four iterations, we get: 1 + 1/2 = 3/2 = 1.5 1 + 1/(2 + 1/2) = 7/5 = 1.4 1 + 1/(2 + 1/(2 + 1/2)) = 17/12 = 1.41666... 1 + 1/(2 + 1/(2 + 1/(2 + 1/2))) = 41/29 = 1.41379... The next thre..

Problem 56 07 November 2003 A googol (10100) is a massive number: one followed by one-hundred zeros; 100100 is almost unimaginably large: one followed by two-hundred zeros. Despite their size, the sum of the digits in each number is only 1. Considering natural numbers of the form, ab, where a, b 100, what is the maximum digital sum? Solution in C# using System; using System.Collections.Generic; ..

Problem 55 24 October 2003 If we take 47, reverse and add, 47 + 74 = 121, which is palindromic. Not all numbers produce palindromes so quickly. For example, 349 + 943 = 1292, 1292 + 2921 = 4213 4213 + 3124 = 7337 That is, 349 took three iterations to arrive at a palindrome. Although no one has proved it yet, it is thought that some numbers, like 196, never produce a palindrome. A number that nev..

Problem 53 26 September 2003 There are exactly ten ways of selecting three from five, 12345: 123, 124, 125, 134, 135, 145, 234, 235, 245, and 345 In combinatorics, we use the notation, 5C3 = 10. In general, nCr = n! r!(nr)! ,where r n, n! = n(n1)...321, and 0! = 1. It is not until n = 23, that a value exceeds one-million: 23C10 = 1144066. How many, not necessarily distinct, values of nCr, for 1 ..