#include <iostream>
#include <fstream>
#include <cstring>
#include <unordered_map>
using namespace std;

ifstream f("secv5.in");
ofstream g("secv5.out");

int n, l_min, l_max;

unsigned long long a[1048600];

int rez(unsigned long long marime)
{
    int ind;
    int rez=0;
    for (int i=1; i<=n; ++i)
    {
        ind=i;
        unordered_map<unsigned long long, int> fr;
        while (fr.size()<=marime && ind<=n)
        {
            fr[a[ind]]++;
            ind++;
            rez++;
        }
        if (ind<=n)
            rez--;
    }
    return rez;
}

int main()
{
    f >> n >> l_min >> l_max;
    for (int i=1; i<=n; ++i)
        f >> a[i];
    g << rez(l_max)-rez(l_min-1);
    return 0;
}