#include <iostream>
#include <iomanip>
using namespace std;

int main( )
{
	float n1, n2, n3;

	cout << "Please input three numbers:" ;
	cin >> n1 >> n2 >> n3;
	cout << setprecision(10);

	cout << "The average of " << n1 << ", " << n2 << " and " << n3;
	cout <<" is: " << setw(12) << (n1+n2+n3)/3 << endl;

    return 0;
}