#include <fstream>
using namespace std;
int n,l,u,contor;
unsigned long long a[1048576];
void Citire()
{
    int i;
    ifstream fin("secv5.in");
    fin>>n>>l>>u;
    for(i=1;i<=n;i++)
        fin>>a[i];
}
void Cautare()
{
    int i,j,nrel,x;
    for(i=1;i<=n;i++)
        for(j=i+1;j<=n;j++){
            nrel=1;
            for(x=i+1;x<j+1;x++)
                if(a[x]!=a[x-1]) nrel++;
            if(nrel>=l && nrel<=u)contor++;
        }
    ofstream fout("secv5.out");
    fout<<contor<<"\n";
}

int main()
{
    Citire();
    Cautare();
    return 0;
}