#include<stdio.h>
#include<stdlib.h>
typedef struct node{
    int data;
    struct node *next;
}Node;

Node *head=NULL,*tail;

void create(int num){
    Node *newNode =(Node*)malloc(1*sizeof(Node));
    newNode->data=num;
    newNode->next=NULL;
    if(head==NULL){
        head=newNode;
        tail=newNode;
    }else{
        tail->next=newNode;
        tail=newNode;
    }
}

void display(int val){
    Node *itr;
    for(itr=head;i=1;itr!=NULL;i<=n;itr=itr->next;i++){
        if(itr->data == val){
           printf("%d",i);
        }
    }
}

int main(){
    int n,i,num,val;
    scanf("%d",&n);
    for(i=0;i<n;i++){
        scanf("%d",&num);
        create(num);
    }
    scanf("%d",&val);
    display(val,n);
    return 0;
}