import java.util.*;
public class Main {
// Online Java Compiler
// Use this editor to write, compile and run your Java code online
static Scanner sc = new Scanner(System.in);
public static void main(String args[]) {
int[] ar = {6,8,1,1,8,3,4};
System.out.println(funct(ar,0,8));
}
public static int funct(int n[],int st,int data){
int val = -1;
if(n.length-1<st)
return val;
if(n.length-1>=st){
val = funct(n,st+1,data);
if(n[st]==data && val == -1)
val=st;
}
return val;
}
}