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#include <iostream>
#include <fstream>
using namespace std;
ifstream f("divk.in");
ofstream g("divk.out");
int main()
{
int x[50000];
int n,a,b,k;
int nr=0;
f>>n>>k>>a>>b;
for(int i=1;i<=n;i++)
f>>x[i];
for(int i=1;i<n;i++)
{
for(int j=i+1;j<=n;j++)
{
if(j-i+1>=a&&j-i<b)
{
long int s=0;
for(int z=i;z<=j;z++)
s=s+x[z];
if(s%k==0)nr++;
}
}
}
g<<nr;
return 0;
}