4
3
2
1
-1
результат 2,75 а не 2,8
package com.javarush.task.task05.task0507;
import java.io.BufferedReader;
import java.io.InputStreamReader;
/*
Среднее арифметическое
*/
public class Solution {
public static void main(String[] args) throws Exception {
BufferedReader readerNumber1 = new BufferedReader(new InputStreamReader(System.in));
int b = 0;
double a = 0;
double y = 0;
while (true) {
int d = Integer.parseInt(readerNumber1.readLine());
if (d == -1)
break;
b++;
a+=d;
y= (double)((a+1)/(b));
}
System.out.println(y);
}
}