today i want to invite you to codefights in codefights you fight with a person in world. but the coding is different! it is not coding, it is debugging race!! there is a wrong code ! you must debug it!! in codefights there are leagues and challanges and etc. the charms of codefights are the coins. in each fight you earn coins. you can save your coin to buy T_shirts. here are some photos of codefights 
url : codefights.com
debugging for money !!! are you kidding me ?!
I'd do for a Klondike bar.
thank you so much for this post.
:)
also please mention that the t shirts are only for US living contestants.
t3rminated Is it true ?
Nope, they ship worldwide. You just put your country in the address field and put a random state. This question has been addressed previously. See here.
Maybe it is repeatedly said by someone but why do this site bans copy-pasting and force everyone to type in the poorly featured editor? It is maybe okay for Debugging challenges but it makes no sense for Codewriting tasks. This makes it a game of pure typing and English reading. Maybe it is good for ICPC contestants (because of their traditional singular rule)? I don't know.
About one year ago, there was a bug fix solo mode and which has some fun to play (some issues were there though) but they suddenly removed this mode. It seems that this site constantly making changes which I don't like.
Exactly! >_> They have some good features like auto-complete on variable name but even using namespace std didn't work and I had to write std:: swap , std::cin, std:: cout,std::string.
Well, auto completion have bugs in Java, in one problem it suggested 'isUppercase()' instead of 'isUpperCase()' for Character class.
this is a really good way to improve my skills.by the way,why t-shirt with different color have different prices?this is not good.:)(JKD,don't mind)
do you agreed the black t shirt is nicer than red t shirt and the red is better than blue????
No, I think it depends on your taste. I think red one is better ;)
how to Procuremen codeforces T_shirt??? is it possible? is there any T_Shirt.
For some special contests like 8VC Venture Cup 2016 - Final Round, AIM Tech Round (Div. 1), Wunder Fund Round 2016 (Div. 1 + Div. 2 combined) it is possible to get a t-shirt.