/***********************************************
	 while•Ά(2)@‡Œv‚Ζ•½‹Ο
***********************************************/
import java.util.*;

public class While_02_goukei {
	public static void main(String[] args) {
		
		Scanner sc=new Scanner(System.in);
		
		int kazu;
		int goukei=0,kensu=0;
		double heikin;
		
		System.out.print("”‚π“ό‚κ‚Δ‰Ί‚³‚’i0‚ŏI—Ήj\n¨");
		kazu=sc.nextInt();
		
		
		while ( kazu != 0 ) {
		
			goukei+=kazu;
			kensu++;
				
			System.out.print("¨");
			kazu=sc.nextInt();

		}
		
		System.out.print("\n");
		System.out.print("‡Œv"+goukei+"\n");
		System.out.print("Œ”"+kensu+"\n");
		
		heikin=(double)goukei/kensu;
		System.out.print("•½‹Ο"+heikin+"\n");
	}

}