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#include <iostream>
#include <fstream>
using namespace std;
ifstream fin ("divk.in");
ofstream fout ("divk.out");
int v[1001];
int main()
{
int n,a,b,k,nr=0;
fin>>n>>k>>a>>b;
for(int i=1;i<=n;i++)
{
fin>>v[i];
}
for(int i=1;i<=n;i++)
{
int S=0;
for(int ii=i;ii<=n;ii++)
{
S=S+v[ii];
if(ii-i+1>=a && ii-i+1<=b && S%k==0)
{
nr++;
}
}
}
fout << nr;
return 0;
}