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This problem is giving me some WA's and I dont know how to solve this. This problem is very easy, I know, but my code is wrong somewhere. I'll leave the code I'm using, here. I hope someone can give me an hint. This problem doesn't deserve so much time. Thanks...


#include "stdio.h"

int main ...

I've solved the problem "Summation of Polynomials" recently, using the expression n * n * (n + 1) * (n + 1) /4 . This expression was calculated following the steps described in the "introduction" of the problem, I suppose. Unfortunately I can't understand those steps.

Can someone explain me how to ...