#include <iostream>
#include <cstdio>
#include <unordered_map>
#define MAXN (1<<21)

using namespace std;

int n, L, U;
unsigned int a[MAXN];
long long sol;

long long tot(int ma)
{
	unordered_map<unsigned int, int> m;
    int sz = 0, ind = 1;
    long long part = 0;
    for (int i = 1; i <= n; i++)
	{
		m[a[i]]++;
        if (m[a[i]] == 1) sz++;
        while (sz > ma)
		{
            m[a[ind]]--;
            if (m[a[ind++]] == 0)
                sz--;
		}
		part += i-ind+1;
	}
	return part;
}

void solve()
{
	sol = tot(U) - tot(L-1);
}

int main()
{
    freopen("secv5.in", "r", stdin);
    freopen("secv5.out", "w", stdout);

    cin >> n >> L >> U;
    for (int i = 1; i <= n; i++)
		cin >> a[i];
	solve();
	printf("%lld\n", sol);

    return 0;
}