#include <iostream>
#include<fstream>
using namespace std;
ifstream f("divk.in");
ofstream f1("divk.out");
int N,A,B,K,a[30];
void citire()
{
    f>>N>>K>>A>>B;
    for (int i=1; i<=N; i++)
        f>>a[i];
}
void verf(int li, int ls, int k)
{
    int i,n,j,s,nr=0;
    for (i=1; i<N; i++)
    {
        j=i+1;
        s=a[i];
        n=1;
        int q=0;
        while (j<=N && q==0)
        {
            n++;
            s+=a[j];
            if (s%k==0 && n<=ls)
            {
                    nr++; q=1;
            }
            else
                j++;
        }
    }
    f1<<nr;
}
int main()
{
    citire();
    verf(A,B,K);
    return 0;
}