#include <bits/stdc++.h>
using namespace std;
int main(){
	int n,i,x;
	cin>>n;
	int a[n];
	for(i=0;i<n;i++)
	{
		cin>>a[i];
	}
	cin>>x;
	for(i=0;i<n;i++)
	{
		if(x==a[i]){cout<<i+1;break;}
		
	}
	return 0;
	}

/**************************************************************
	Problem: 1399
	User: ljl2
	Language: C++
	Result: Wrong Answer
****************************************************************/