?
package com.javarush.task.task05.task0507;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.InputStream;
import java.io.Reader;
/*
Среднее арифметическое
*/
public class Solution
{
public static void main(String[] args) throws Exception
{
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
int w = 0;
int y = 0;
while (true)
{
int x = Integer.parseInt(reader.readLine());
if (x!=(-1))
{
y += x;
w++;
}
break;
}
int average = (y+1)/(w-1);
System.out.println(average);
}
}