import java.io.*;
import java.util.*;
public class ArrayStuff {
private int[] a;
public ArrayStuff() {
r = new Random();
a = new int[20];
for (int i=0;i<a.length;i++)
a[i]=r.nextInt(100);
}
public String toString() {
return Arrays.toString(a);
}
public int get(int n) {
return a[n];
}
public int findMaxIndex() {
int maxi = 0;
for (int i=0;i<a.length;i++) {
if (a[i]>a[maxi])
maxi=i;
}
return maxi;
}
public int find(int n) {
for (int i=0;i<a.length;i++) {
if (a[i]==n)
return i;
}
return -1;
}
public double mean(int[] a){
int len = a.length;
int i = 0;
int result = 0;
while (i < len){
result = result + a[i];
i = i + 1;
}
return result / len * 1.0;
}
public double stddev(int[] a){
int result = 0;
while (i < len){
(a[i] - mean(a)) * (a[i] - mean(a));
i = i + 1;
}
result = mean(a);
result = Math.aqrt(a);
}
}