using namespace std;
#include<iostream>
int main()
{
	unsigned int n,s=0,nr=1;
	cout<< "n=";
	cin>>n;
	do
	{ 
		s=s+nr;
	nr=nr+1;
	}
	while(nr<=n);
		cout<< "suma primelor" << n << "nr=" << s;
	return 0 ;
}