not meeting last couple requirements
package com.codegym.task.task05.task0507;
/*
Arithmetic mean
*/
import java.io.BufferedReader;
import java.io.InputStreamReader;
public class Solution {
public static void main(String[] args) throws Exception {
//write your code here
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
double s = 0;
int c = 0;
while (true){
double n = Integer.parseInt(reader.readLine());
s += n;
c++;
if (n == -1){
break;
}
}
System.out.println(s/c);
}
}