/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		// your code goes here
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int Arr[] = new int[N];
		for(int i=0; i<N; i++){
			Arr[i] = sc.nextInt();
		}
		int k = sc.nextInt();
 
		Map<Integer,Integer> map = new HashMap<>();
 
        int sum=0, count=0; 
        for(int i=0; i<N ; i++){
            sum+=Arr[i];
            if(sum==k){
                count++;
            }
            count += map.getOrDefault(sum-k,0);
            map.put(sum, map.getOrDefault(sum,0)+1);
 
        }
        System.out.println(count);
	}
}

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NQoxMCAyIC0yIC0yMCAxMAotMTA=

5
10 2 -2 -20 10
-10