#include <iostream>
using namespace std;

int main() 
{
	int max;
	cout << "Maximalwert = ";
	cin >> max;
	int sum = 0;
	for (int i=1; i <= max; i++) {
		sum = sum + i;
		cout << "Summe der natürlichen Zahlen bis "
		     <<	i << " : " << sum << endl;
	}
	return 0;
}