BirthdayChocolate.java

import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class Solution {

    public static void main(String args[]) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int s[] = new int[n];
		for(int i = 0; i < n; i++) {
			s[i] = sc.nextInt();
		}
		int d = sc.nextInt();
		int m = sc.nextInt();
		int count = 0;
		for(int i = 0; i <= n-m; i++) {
			int sum = 0;
			for(int j = i; j < i+m; j++) {
				sum += s[j];
			}
			if(sum==d)
				count++;
		}
		System.out.println(count);
	}
}