#include <fstream>

using namespace std;
ifstream cin("divk.in");
ofstream cout("divk.out");
long long nr,n,i,k,a,b,v[500005],j,sum,s[500005];
int main()
{
    cin>>n>>k>>a>>b;
    for(i=1; i<=n; i++)
    {
        cin>>v[i];
        s[i]=s[i-1]+v[i];
    }
    for(i=1;i<=n;i++)
    {
        for(j=i+1;j<=n;j++)
        {
            sum=s[j]-s[i-1];
            if(sum%k==0&&j-i+1>=a&&j-i+1<=b)
            {
                nr++;
            }
        }
    }
    cout<<nr;
    return 0;
}