#include <iostream>
#include <fstream>
#define NMAX 500002

using namespace std;

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

int n,a,b,k,v[NMAX],s[NMAX],sum,nr;

int main()
{
    in >> n >> k >> a >> b;
    for(int i=1;i<=n;i++)
        in >> v[i];

    for(int i=1;i<=n;i++)
        s[i] = s[i-1] + v[i];

    for(int i=1;i<=n;i++)
    {
        for(int j=0;j<i;j++)
        {
            sum = s[i] - s[j];
            if(sum%k==0 && (i-j+1)>=a && (i-j+1)<=b)
                nr++;
        }
    }
    out << nr;
    return 0;
}