WA3. O(N^2) solution

Gimme some tests, please :) All tests that I found my program passed right, I can't understand my mistake.

Now I have WA4 :)

*Edited by author 08.07.2012 10:07*

Re: WA3. O(N^2) solution

can anybody explain me an idea of N^2?

Re: WA3. O(N^2) solution

I think there is no O(N^2) solution, but who knows? Maybe, I'm not right. Now my AC solution is nearly O(N^3) (something like N^3-N^4 operation) - it's enough.