#include <bits/stdc++.h>
using namespace std;
 
 
int bs(vector<int> &b, int x, int low, int high){
	int ans = -1;
	while(low <= high){
		int mid = low + (high-low) / 2;
 
		if(b[mid] <= x){
			low = mid + 1;
		}
		else{
			ans = mid;
			high = mid - 1;
		}
	}
	return ans;
}
 
int main() {
	// your code goes here
	int n;
	cin>>n;
 
	vector<int> b(n);
	for(int i = 0; i < n; i++){
		cin>>b[i];
	}
 
	int x;
	cin>>x;
	int low = 0, high = n-1;
	int index = bs(b,x,low,high);
	cout<<index<<endl;
	return 0;
}

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NwozIDUgNSA4IDggMTAgMTIKNg==

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