/*
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	while文　入力した値を合計する　While_02_goukei
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*/
import java.io.*;

class While_02_goukei {
	public static void main(String[] args) throws Exception {
		
		int kazu,goukei,kensu;
		double heikin;
		
		goukei=0;
		kensu=0;

		BufferedReader inp=new BufferedReader
			(new InputStreamReader(System.in));
		String keybd;

		System.out.print("数を入れてください（０で終了)\n");
		System.out.print("-->");
		keybd=inp.readLine();
		kazu=Integer.parseInt(keybd);
		
		while ( kazu!=0 ) {
			
			goukei+=kazu;
			kensu++;
			
			System.out.print("-->");
			keybd=inp.readLine();
			kazu=Integer.parseInt(keybd);
			
		}
		heikin=(double)goukei/kensu;
		
		System.out.print("合計＝"+goukei+"\n");
		System.out.print("件数＝"+kensu+"\n");
		System.out.print("平均＝"+heikin+"\n");
	}
}