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#include<iostream>
#include<fstream>
using namespace std;
long long k,a,b,n,v[10000],i,j;
int suma(int i,int j)
{
int sum=0,s;
for(s=i;s<=j;s++)
{
sum=sum+v[s];
}
return sum;
}
int main()
{
int nr,lung;
fstream f("divk.in",ios::in);
f>>n>>k>>a>>b;
for(i=1;i<=n;i++)
{
f>>v[i];
}
f.close();
nr=0;
for(i=1;i<=n;i++)
{
for(j=1;j<=n;j++)
{
lung=j-i+1;
if((lung>=a)&&(lung<=b))
{
if(suma(i,j)%k==0)
{
nr++;
}
}
}
}
fstream g("divk.out",ios::out);
g<<nr;
g.close();
}