#30256: C++ 參考


cataholic.0000@gmail.com (貓奴)


#include <iostream>

using namespace std;

int main (){

 long double n;

 while(cin>>n)

  cout<<(long int)((n+1)*(n/2))<<" "<<(long int)(n*(n+1)*(n/2)-n*(n+1)*(n-1)/3)<<endl;

 return 0;

}