import java.io.*;
import java.util.*;
public class Driver{
public static void main(String[] args){
Arrays_three A = new Arrays_three();
int[] intArray = new int[10];
int[] ArrayTwo = new int[9];
for (int i=1; i<11; i++){
intArray[i-1] = i;
}
for (int j = 1; j<10; j++){
ArrayTwo[j-1] = j;
}
System.out.println(A.mean(intArray));
System.out.println(A.stddev(ArrayTwo));
}
}