摘要：This two call convention puzzels me since I knew them. MSDN explanations as below: _stdcall The __stdcall calling convention is used to call Win32 API functions. The callee cleans the stack. _cdecl ... 阅读全文

摘要：Problem Description The primes 3, 7, 109, and 673, are quite remarkable. By taking any two primes and concatenating them in any order the result will 阅读全文

摘要：Problem Description 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 3138 17 16 15 14 13 3039 18 5 4 3 12 2940 19 6 1 ... 阅读全文

摘要：Problem Description Each character on a computer is assigned a unique code and the preferred standard is ASCII (American Standard Code for Information Interchange). For example, uppercase A = 65, aste... 阅读全文

摘要：Problem Description It is possible to show that the square root of two can be expressed as an infinite continued fraction. sqrt(2) = 1 + 1/(2 + 1/(2 + 1/(2 + ... ))) = 1.414213... By expanding this f... 阅读全文

摘要：Problem Description 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... 阅读全文

摘要：Problem Description 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 = 42134213 + 3124 = 7... 阅读全文