#include <bits/stdc++.h>

using namespace std;

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

int n, l, u, v[1048580];
int f(int x)
{
    if (x == 0) return 0;
    unordered_map <int, int> h;
    int ans = 1;
    int contor = 1, st = 1;
    h[v[1]] = 1;
    for (int i = 2; i <= n; ++i)
    {
        h[v[i]]++;
        if (h[v[i]] == 1)
            ++contor;
        while (contor > x)
        {
            h[v[st]]--;
            if (h[v[st]] == 0)
                --contor;
            ++st;
        }
        ans += i - st + 1;
    }
    return ans;
}

int main()
{
    fin >> n >> l >> u;
    for (int i = 1; i <= n; ++i)
        fin >> v[i];
    fout << f(u) - f(l - 1);
    fin.close();
    fout.close();
    return 0;
}