#25559: 快速解
jammy42786898@gmail.com
(よだよ)
拿筆隨便算一算就有答案了
#include <iostream>
#include <cstdlib>
using namespace std;
int main()
{
int a;
while (cin >> a)
{
unsigned long long int c, d;
c = (a * (a + 1)) / 2;
d = (c * (a + 2)) /3;
cout << c << " " << d << "\n";
}
system("pause");
return 0;
}