//************************
// Bagheri. Naser
//ProjectEuler Problem #6
//************************
#include <iostream>
using namespace std;
int main()
{
	long int sn = 0;
	long int sn2 = 0;
	long int j = 0;
	int n = 100;
 
	sn = n * (n+1)/ 2;
	sn2 = (n*(n+1)*(2*n+1))/6;
	j=sn*sn-sn2;
	cout<<j<<endl;
return 0;
}