Here is the problem (Summation of Four Primes) states that : The input contains one integer number N (N<=10000000) in every line. This is the number you will have to express as a summation of fou
Why does this code return the sum of factors of a number? In several Project Euler problems, you are asked to compute the sum of factors as a part of the problem.On one of the forums there, someone p
Suppose I have an int x = 54897, old digit index (0 based), and the new value f开发者_如何学Goor that digit. What\'s the fastest way to get the new value?
I\'m solving some classic problems in Haskell to develop my functional skills and I have a problem to implement an optimization suggested at this \"Programming Praxis\" site:
We\'ve got some nonnegative numbers. We want to find the pair with maximum gcd. actually this maximum is more important than the pair!
I already have prime factorization (for integers), but now I want开发者_StackOverflow中文版 to implement it for gaussian integers but how should I do it? thanks!This turned out to be a bit verbose, bu
I have a series S = i^(m) + i^(2m) + ...............+ i^(km)(mod m) 0 <= i < m, k may be very large (up to 100,000,000),m <= 300000
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