#include <iostream>
using namespace std;

int main()
{
	unsigned long long gräns, tal = 1, summa = 0; // Summan sätts till 0.
	cout << "Skriv ett positivt heltal: ";
	cin >> gräns;
	do
		summa += tal++;
	while (summa < gräns);
	cout << "Summan: " << summa << endl;
	cout << "Antalet termer: " << tal << endl;
	return 0;
}