I wanted to ask that is there something like code arena available for CodeForces problem anywhere for one on one fight like its there on Hackerearth. Is there any website that provides such a platform for Codeforces problems or Topcoder problems?

If there is no such platform available will it be a good support for Codeforces to have such a built platform here itself? Please suggest on this.

Thanks for the help.

Happy Coding