Hey, lysium, It's just you :) First of all, in problem 9, 20, it's part of the problem to find the pattern :) And for the problem 22, an ARRAY of numbers is div

Hey, lysium, It's just you :) First of all, in problem 9, 20, it's part of the problem to find the pattern :) And for the problem 22, an ARRAY of numbers is divided into substrings, which is possible ( and substring isn't necessarily a part of a char string, and the problem statement clearly defined a substring as a subset made of consecutive elements :P ) And the site is still new, so you can't judge to such a big site as Project Euler, and the existence of Open-CS doesn't eliminate that of Project Euler, no one ever said it wasn't a good site Good luck in getting problems :P