#include <fstream>
#include <deque>

using namespace std;

ifstream fin("divk.in");
ofstream fout("divk.out");

deque <int> v;

long long x,a,b,s;


int main()
{
    long long n,k=0,m;
    fin>>n>>x>>a>>b;
    for(int i=0;i<n;i++)
    {
        fin>>m;
        if(v.size()<b)
            {
                v.push_back(m);
                s+=m;
                if(s%x==0)
                    k++;
            }
        if(v.size()==b||i==n-1)
        {
            int g=v.size();
            while(g>=a)
            {
                if(s%x==0)
                    k++;
                s-=v.front();

                v.pop_front();
                g--;
            }
        }

    }
    fout<<k;

}