#include <iostream>
using namespace std;

int jumlahDeret(int n) {
	if (n == 1)
       return 1;
    return n + jumlahDeret (n - 1);
}

int main() {
	int n = 5;
	cout << "Jumlah 1 sampai " << n << " = " << jumlahDeret(n) << endl;
	return 0;
}