Online JudgeProblem SetAuthorsOnline ContestsUser
Web Board
Home Page
F.A.Qs
Statistical Charts
Problems
Submit Problem
Online Status
Prob.ID:
Register
Update your info
Authors ranklist
Current Contest
Past Contests
Scheduled Contests
Award Contest
User ID:
Password:
  Register

公式....

Posted by Javran at 2010-07-31 21:07:57 on Problem 2000
#include <stdio.h>
#include <math.h>

int main()
{
	int n;
	int k;
	int sum;
	while (scanf("%d",&n) && n)
	{
		k=floor((sqrt(1+8*n)-1)/2);
		sum=(6*n-k-k-k*k)*(1+k)/6;
		printf("%d %d\n",n,sum);
	}
}

Followed by:

Post your reply here:
User ID:
Password:
Title:

Content:

Home Page   Go Back  To top


All Rights Reserved 2003-2013 Ying Fuchen,Xu Pengcheng,Xie Di
Any problem, Please Contact Administrator