#include <iostream>
#include <vector>

using namespace std;

int main()
{
	vector<double> vec;

	double val;
	while(cin >> val)
	{
		vec.push_back(val);
	}

	double sum = 0.0;
	for(int i = 0; i < vec.size(); ++i)
		sum += vec[i];
	cout << "somme : " << sum << endl;
}