#include <iostream>
using namespace std;

int main()
{
	int cnt = 0, 		// Count of numbers read. 
	    tot = 0;		// Total of numbers read.
	int num;		// Input number.

	// Read all the numbers (until a read fails and the stream
	// turns bad.)
	cin >> num;
	while(cin.good()) {
		tot += num;
		++cnt;
		cin >> num;
	}

	/* Print the average. */
	if(cnt > 0)
		cout << "Average is " << (double)tot / (double)cnt << endl;
	else
		cout << "No numbers." << endl;
}