import java.util.*;
class Ideone
{
{
/*int number=0;
int average=0;
int counter=0;
int sum=0;
Scanner sc = new Scanner(System.in);
number = sc.nextInt();
while (number > 0) {
counter++;
sum = sum + number;
average= sum/counter;
}
System.out.println("this is the average:" + average);*/
int average = 0;
int counter = 0;
int sum = 0;
int number = 0;
Scanner sc
= new Scanner
(System.
in); number = sc.nextInt();
while (number >= 0)
{
counter++;
sum +=number;
number = sc.nextInt();
}
if (counter == 0)
counter = 1;
average = sum/counter;
System.
out.
println("this is the average:" + average
); }
}
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