#include <fstream>
#include <unordered_map>

using namespace std;
const int NMAX = (1 << 20) + 1;

int N;
unsigned v[NMAX];

ifstream fin("secv5.in");
ofstream fout("secv5.out");

long long calcul(int dif)
{
    unordered_map <unsigned, int> M;
    long long nrSec = 0;
    int nrDif = 0, p = 1;
    for(int i = 1; i <= N; ++i)
    {
        if(++M[v[i]] == 1)
            ++nrDif;
        while(nrDif > dif && p <= i)
        {
            if(--M[v[p]] == 0)
                --nrDif;
            ++p;
        }
        nrSec += i - p + 1;
    }
    return nrSec;
}

int main()
{
    int L, U;
    fin >> N >> L >> U;
    for(int i = 1; i <= N; ++i)
        fin >> v[i];
    fout << calcul(U) - calcul(L - 1);
    fin.close();
    fout.close();
    return 0;
}