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