package java59;

import java.util.Scanner;

public class Demo2 {

	public static void main(String[] args) {
		Scanner input = new Scanner(System.in);
		
		double sum=0,avg=0,time;
		for(int i=1;i<=5;i++) {
			System.out.print("周" + i +"的学习时间：" );
			time = input.nextInt();
			sum+=time;
		}
		avg = sum/5;
		System.out.println("周一~周五平均学习时间为：" +avg+"小时");

	}

}