Today i've resolved many solutions and all the time i have "Unfortunately your solution is wrong.". And i'm sure the solution is correct ... where is the problem ?

Surely the problem is your solution is not correct. By the way you can PM me your solutions for the challenges i have solved and i'll check them all.

That's by far the most amusing post i have seen on any challenge site

Probably your checking software is bad and nobody ever noticed....

Sorry for phun.....