#include <cstdio>
#include <vector>

using namespace std;

#define Nmax 1050000
#define Tmax 666013
#define pb push_back
#define sz(a) int((a).size())

int i, j, n, l, u, ct, st, dr;
const int r = 3079;
long long sol;
unsigned int sir[Nmax];
vector<int> t[Tmax];
int v[Nmax];

void citire()
{
    scanf("%d %d %d\n", &n, &l, &u);
    for (i=1; i<=n; ++i)
        scanf("%u\n", &sir[i]);
}

int hash(unsigned int x)
{
    long long p = x;
    return (p * r) % Tmax;
}

long long solve2(int m)
{
    st = 1;
    ct = 0;
    long long ret = 0;
    for (dr=1; dr<=n; ++dr)
    {
        if (!v[sir[dr]])
            ++ct;
        ++v[sir[dr]];
        while (ct > m)
        {
            if (v[sir[st]] == 1)
                --ct;
            --v[sir[st]];
            ++st;
        }
        ret += dr - st + 1;
    }
    return ret;
}

void solve()
{
    for (i=1; i<=n; ++i)
        t[hash(sir[i])].pb(i);
    for (i=0; i<Tmax; ++i)
        if (sz(t[i]) > 0)
        {
            ++ct;
            for (j=0; j<sz(t[i]); ++j)
                sir[t[i][j]] = ct;
        }
    sol = solve2(u);
    memset(v, 0, sizeof(v));
    sol -= solve2(l-1);
    printf("%lld\n", sol);
}

int main()
{
    freopen("secv5.in", "r", stdin);
    freopen("secv5.out", "w", stdout);
    citire();
    solve();
    return 0;
}