using System.CodeDom.Compiler; using System.Collections.Generic; using System.Collections; using System.ComponentModel; using System.Diagnostics.CodeAnalysis; using System.Globalization; using System.IO; using System.Linq; using System.Reflection; using System.Runtime.Serialization; using System.Text.RegularExpressions; using System.Text; using System;

class Result {

/*
 * Complete the 'birthday' function below.
 *
 * The function is expected to return an INTEGER.
 * The function accepts following parameters:
 *  1. INTEGER_ARRAY s
 *  2. INTEGER d
 *  3. INTEGER m
 */

public static int birthday(List<int> s, int d, int m)
{
  int count = 0;
    int len = s.Count;
    // Loop through the list
    for (int i = 0; i <= len - m; i++)
    {
        int sum = 0;
        // Calculate the sum of the next m elements
        for (int j = 0; j < m; j++)
        {
            sum += s[i + j];
        }
        // Check if the sum equals d
        if (sum == d)
        {
            count++;
        }
    }
    return count;
}

}

class Solution { public static void Main(string[] args) { TextWriter textWriter = new StreamWriter(@System.Environment.GetEnvironmentVariable("OUTPUT_PATH"), true);

    int n = Convert.ToInt32(Console.ReadLine().Trim());

    List<int> s = Console.ReadLine().TrimEnd().Split(' ').ToList().Select(sTemp => Convert.ToInt32(sTemp)).ToList();

    string[] firstMultipleInput = Console.ReadLine().TrimEnd().Split(' ');

    int d = Convert.ToInt32(firstMultipleInput[0]);

    int m = Convert.ToInt32(firstMultipleInput[1]);

    int result = Result.birthday(s, d, m);

    textWriter.WriteLine(result);

    textWriter.Flush();
    textWriter.Close();
}

}